At the heart of every WDM subsystem is an optical filtering architecture that combines and separates wavelength channels with high precision. Among the most widely used solutions are Z-Block and Thin Film Filter (TFF) Prism technologies. Although both perform the same fundamental function, they differ in optical design, manufacturing processes, and application characteristics.

This article provides an overview of how these two technologies work and the key factors to consider when selecting a WDM optical solution.

What Is Z-Block Technology?

Block is a highly integrated free-space optical assembly designed for wavelength multiplexing and demultiplexing. It integrates multiple precision optical components—including thin-film filters, mirrors, collimating lenses, and fiber arrays—within a single compact optical module.

The name “Z-Block” comes from the zigzag optical path that light follows as it passes through multiple reflective and transmissive optical elements inside the assembly.

By integrating these components into one precisely aligned structure, Z-Block technology delivers consistent optical performance while reducing the number of discrete optical assemblies required.

How Does Z-Block Work?

During demultiplexing, the incoming optical signal enters the Z-Block through a collimating lens, which converts the divergent beam into parallel light before it reaches a sequence of thin-film filters.

Each filter extracts one wavelength channel while allowing the remaining channels to continue through the optical path. Mirrors redirect the separated wavelengths toward their designated output ports until all channels have been demultiplexed.

When operating as a multiplexer, the process is simply reversed, combining multiple wavelength channels into a single output fiber.

This integrated optical path helps maintain low insertion loss and stable wavelength performance across multiple channels.

Advantages and Limitations of Z-Block

Key advantages include:

• Highly integrated architecture
• Low insertion loss
• Excellent wavelength consistency
• Compact package design
• High mechanical stability

Limitations

• Complex optical alignment during manufacturing
• Higher production cost compared with simpler assemblies
• Limited flexibility after final assembly
• Tight manufacturing tolerances

What Is TFF Prism Technology?

Thin Film Filter (TFF) Prism technology is another well-established optical filtering architecture widely used in CWDM and DWDM systems. Rather than integrating all optical elements into a single assembly, it combines precision thin-film filters with prism optics to separate or combine optical wavelengths.

Each thin-film filter is coated with multiple dielectric layers designed to selectively reflect or transmit specific wavelengths while the prism guides the optical path between filtering stages.

TFF Prism technology has been widely deployed in CWDM and DWDM applications due to its mature manufacturing process and proven reliability.

How Does TFF Prism Work?

As the optical signal enters the prism assembly, it is directed toward a series of thin-film filters.

Each filter is designed for a specific wavelength channel. Depending on its optical coating, a particular wavelength is either reflected toward an output port or transmitted to the next filtering stage.

This sequential filtering process continues until every wavelength has been separated or combined.

Because each optical element performs an individual filtering function, TFF Prism assemblies offer excellent wavelength selectivity while supporting flexible channel configurations.

Advantages and Limitations of TFF Prism

Key advantages include：

• Mature and proven technology
• High wavelength selectivity
• Excellent channel isolation
• Flexible optical configurations
• Reliable long-term performance

Limitations

• Larger optical assembly compared with integrated designs
• More individual optical components
• Cumulative insertion loss may increase as channel count grows
• Assembly complexity increases with higher channel densities

Z-Block vs. TFF Prism

Although both technologies are designed for wavelength multiplexing and demultiplexing, each offers distinct advantages depending on the application.

Neither technology is universally better than the other. The optimal choice depends on system requirements such as channel count, insertion loss, package size, manufacturing complexity, and overall network design.

Conclusion

Z-Block and TFF Prism technologies both play important roles in modern WDM systems. While they share the same objective of efficiently multiplexing and demultiplexing optical wavelengths, they achieve this through different optical architectures and manufacturing approaches.

Understanding the characteristics of each technology allows network designers and system integrators to select the most appropriate solution based on performance requirements, scalability, and application needs.

As WDM technologies continue to advance, both Z-Block and TFF Prism architectures will remain essential optical building blocks, supporting higher-capacity networks with reliable wavelength multiplexing and demultiplexing performance.

FIBERSTAMP Insight

From CWDM and DWDM to O-Band TFF MUX/DEMUX and coherent optical solutions, FIBERSTAMP focuses on delivering precision-engineered WDM subsystems designed for stable optical performance and long-term reliability.

The post Inside the Optics: Understanding Z-Block and TFF Prism Technologies in WDM Systems first appeared on FIBERSTAMP.

For short-reach interconnect applications, the white paper examines the advantages of NRZ modulation and “Half-DSP” architectures, including LPO and hybrid approaches, in reducing latency and power consumption. It also highlights the increasing adoption of PAM4 modulation as data rates continue to scale.

For data center interconnect (DCI) applications, the white paper discusses O-BAND incoherent DWDM technology as a cost-effective complementary approach to traditional C-BAND coherent solutions. The technology enables optimized deployment for transmission distances ranging from 2 km to 30 km, with advantages in latency, power efficiency, and overall system cost.

Looking toward the 1.6T era, the white paper analyzes three optical architecture approaches: standard pluggable optical modules, external laser source-based pluggable modules, and external laser source NPO (Near-Packaged Optics) architectures. These approaches are evaluated based on their respective deployment scenarios across near-term, mid-term, and long-term network evolution stages.

At the network architecture level, the white paper highlights all-optical switching solutions based on AWGR (Arrayed Waveguide Grating Router) technology. By integrating AWGR with optical amplification technologies such as EDFA or SOA, these architectures enable nanosecond-level switching latency at critical network nodes, reduce power consumption, and help overcome optical-electrical-optical (O-E-O) conversion limitations, providing a scalable architectural reference for large-scale AI cluster interconnects.

The full white paper is now available for download at :

https://www.fiberstamp.com/brochures/Next-Generation-AI%20Computing%20-Network%20-Architecture.pdf

The post FIBERSTAMP Releases White Paper on Next-Generation AI Computing Network Architecture and Optical Interconnect Technology Analysis first appeared on FIBERSTAMP.

1. Building Low-Latency and Low-Power Data Center Interconnect Networks with NRZ Modulation and Half-DSP Technologies

Within AI computing data center networks, NRZ (Non-Return-to-Zero) modulation and “Half-DSP” / linear-drive solutions, including LPO (Linear Pluggable Optics) and Hybrid architectures, have become important technology approaches for achieving both low latency and low power consumption.

These two technology paths are designed for different data rates and transmission distance scenarios. The core objective is to meet the requirements of high-speed interconnects while addressing the high power consumption and latency challenges associated with traditional full-DSP optical modules.

1.1 NRZ Modulation: Mature, Reliable, and Optimized for Ultra-Low Latency

NRZ is a traditional binary modulation technology where each symbol carries one bit of information. In short-distance interconnect applications, its simple physical-layer characteristics make it a preferred solution for latency-sensitive networks.

Application Scenarios

NRZ is mainly used in interconnect scenarios with single-channel speeds ≤200Gbps.

With continued technology evolution, some high-performance SerDes solutions are exploring NRZ-based optimization approaches for higher-speed applications. However, mainstream high-speed optical interconnects at 400G/800G and beyond have transitioned to PAM4 modulation.

Key Advantages

Ultra-Low Latency

NRZ does not require complex digital signal processing (DSP) for signal equalization and error correction. The electrical-to-optical conversion process introduces almost no additional processing latency.

Low Power Consumption

With a simpler circuit architecture and without the high power overhead of DSP chips, NRZ-based optical modules typically maintain low power consumption levels, generally within several watts.

High Signal-to-Noise Ratio Tolerance

In optical fiber transmission, channel loss is relatively low. The two-level NRZ signal provides strong resistance to interference and maintains good signal integrity.

Limitations

NRZ has relatively low spectral efficiency and cannot efficiently support high-speed transmission beyond 50Gbps per wavelength.

Therefore, in mainstream 400G/800G and higher-speed data center and AI computing interconnect architectures, NRZ is gradually being replaced by PAM4 modulation.

FIBERSTAMP’s 200G QSFP-DD S8/PSM8 parallel optical module represents a milestone product in this field.

1.2 “Half-DSP” Modulation Solutions: LPO and Hybrid Technologies

“Half-DSP” is not a formal industry standard term. It generally refers to reduced-DSP or DSP-free optical architectures, including:

LPO (Linear Pluggable Optics)

Hybrid / LRO (Linear Receive Only)

These solutions aim to maintain sufficient signal integrity while significantly reducing the power consumption and latency associated with traditional full-DSP optical modules.

LPO (Linear Pluggable Optics)

The LPO architecture completely removes the DSP chip from the optical module and retains only the linear driver and TIA (Transimpedance Amplifier).Signal processing and equalization are mainly handled by the advanced equalization capability of the switch-side ASIC.

Hybrid (Half Retimed & Half Linear) / LRO (Linear Receive Only)

Hybrid solutions typically retain partial linear-drive functionality at the transmitter or receiver side, or utilize simplified DSP logic in specific signal paths to achieve a balance between performance and power efficiency.

Key Characteristics

Balanced Power Efficiency and Performance

Compared with LPO, Hybrid solutions can provide improved signal integrity for longer transmission distances (such as 100m–2km) while still achieving approximately 20%–30% power savings compared with full-DSP solutions.

Latency Optimization

Although some signal processing capability is retained, simplified algorithms or reduced DSP functions enable significant latency reduction.

Application Scenarios

Hybrid and LRO solutions are suitable for 100m–2km short-to-medium distance interconnect applications, where transmission distance requirements remain important while power efficiency is highly valued.

Core Technology Comparison

FIBERSTAMP’s Half-DSP / Hybrid optical modules and active optical cable (AOC) product portfolio represent engineering innovations in this field, providing practical solutions for large-scale network deployment with enhanced feasibility compared with traditional LPO/LRO approaches.

Representative products include:

HYBRID Single-Mode Optical Modules

HYBRID Multimode and Single-Mode AOC

HYBRID Copper Cable Solutions

2. O-BAND Non-Coherent DWDM as an Efficient Complement to Coherent Communication for Low-Latency and Cost-Effective Medium-Distance DCI

With the rapid growth of AI computing clusters and distributed data centers, Data Center Interconnect (DCI) networks are facing increasing demands for 400G/800G/1.6T high-speed optical interconnect solutions.

Although traditional coherent communication technologies provide excellent long-distance transmission capabilities, their complex DSP architecture, high power consumption, higher cost, and increased transmission latency have created efficiency and cost challenges for short- and medium-distance DCI applications within 30km.

To address this challenge, FIBERSTAMP has introduced an O-BAND (1310nm window) non-coherent DWDM product portfolio.

By leveraging the natural zero-dispersion characteristics of the O-BAND window, this architecture eliminates the need for DCM (Dispersion Compensation Module) and enables an efficient transmission solution optimized for medium-distance data center interconnect applications.

Compared with traditional C-BAND coherent solutions, O-BAND non-coherent DWDM provides the following key advantages:

Low Latency: By eliminating complex DSP-based dispersion compensation processing, the solution significantly reduces link transmission latency, making it highly suitable for latency-sensitive applications such as AI training and Real-time computing resource scheduling .

Low Power Consumption: By adopting Silicon Photonics integration technology and PAM4 modulation architecture, the overall power consumption is significantly lower than traditional coherent optical modules.

Cost Efficiency: The architecture eliminates the need for expensive coherent components, DCM modules, and complex optical line system designs, significantly reducing: CAPEX, Network deployment cost and Operation and maintenance expenses.

High-Density Deployment: The solution supports high-density optical module form factors including QSFP-DD and OSFP,meeting the requirements of next-generation large-scale data center deployments.

Open and Flexible Architecture: The solution supports open optical networking architectures and is compatible with white-box switches , open optical line systems and Improving overall network flexibility and deployment efficiency.

From 100G to 800G and further toward 1.6T, FIBERSTAMP has established one of the industry’s most complete O-BAND DWDM pluggable product portfolios, covering different generations and capacity requirements for data center interconnect networks.

Product Portfolio:

1. 100G QSFP28 DWDM1

• Single wavelength 100G transmission
• Simplified deployment and operation
• System supports up to 16-channel wavelength transmission

2. 200G/400G QSFP-DD DWDM4

• 4-wavelength aggregation
• 50G/100G per wavelength
• System supports up to 16-channel wavelength transmission

3. 800G OSFP/QSFP-DD 2×PSM DWDM4 (O-BAND)

• Single wavelength 100G PAM4
• System supports up to 16-channel wavelength transmission

4. 1.6T OSFP224-EL 2×PSM DWDM4 (O-BAND)

• Single wavelength 200G PAM4
• External light source architecture
• System supports up to 16-channel wavelength transmission

O-BAND DCI Interconnect Application Scenario

Transmission Distance: 2km–30km

3.Three Flexible Solutions for 1.6T AI & Data Center Interconnect

With the explosive growth of AI computing requirements, data center interconnect bandwidth is rapidly evolving from 400G/800G toward 1.6T.

To meet deployment requirements across different application scenarios, the industry is developing three major technology approaches for 1.6T optical interconnects. Each solution provides different advantages and is optimized for different requirements in terms of cost structure ,power budget and deployment scalability.

3.1 Standard 1.6T Pluggable Optical Transceiver

Standard 1.6T OSFP224 Optical Module

The 1.6T OSFP224 optical module is a next-generation high-speed optical transceiver featuring:

• Total bandwidth of 1.6Tbps
• OSFP224 form factor
• Designed to support AI clusters and high-performance computing bandwidth requirements

It represents one of the mainstream solutions for next-generation AI networking deployments.

Core Parameters and Definition

Data Rate and Form Factor

Total Data Rate: 1.6Tbps total bandwidth is achieved through 8 × 200G PAM4 electrical channels

After protocol overhead, the effective payload reaches approximately 1.6Tbps.

OSFP224 Form Factor

OSFP224 is an evolution of the traditional OSFP form factor. It features:

• 224 electrical contacts
• Support for 16 electrical lanes
• Higher port density
• Enhanced thermal capability

It is designed for high-density AI switch deployments.

Standard 1.6T Pluggable Module Solutions

3.2 External Light Source 1.6T Pluggable Optical Module (ELS-Pluggable)

This architecture separates the laser source from the 1.6T OSFP224 optical module.

A centralized:

• Rack-level external light source
• Board-level external light source
• Co-packaged light source

provides optical power to multiple pluggable modules through fiber coupling.

The optical module itself only retains modulators and photodetectors and required electrical processing components. This architecture significantly reduces thermal load at the individual module level.

As one of the pioneers proposing the External Light Source 1.6T Pluggable Optical Module architecture, FIBERSTAMP provides the following solutions:

3.3 External Light Source 1.6T (16×100G) NPO Solution

Near-Package Optics (NPO)

The NPO architecture represents a transition technology between pluggable optics and Co-Packaged Optics (CPO). In the NPO architecture, the optical engine is no longer integrated inside the switch ASIC package.

Instead, it is installed immediately outside the package:

Optical engine distance from ASIC: <50mm

Combined with an external light source, NPO enables ultra-short-distance high-speed interconnects through:

Silicon Photonics

Polymer waveguide technologies

The 1.6T NPO solution is typically deeply integrated with Silicon Photonics platforms to achieve extremely low electrical-to-optical transmission loss.

It should be noted that practical NPO optical engine architectures generally need to be based on:

16×100G physical architecture

32×100G physical architecture

This represents the key differentiation point compared with 1.6T pluggable optical modules.

Although the industry is exploring:

• 3.2T NPO
• 6.4T NPO

Architectures based on 224G SerDes technology, related standards have not yet been finalized.

Comparison of Three 1.6T Solutions

Deployment Roadmap

The three solutions are not mutually exclusive alternatives.

Instead, they represent a layered deployment strategy targeting different technology maturity stages and application scenarios.

Near Term (2024–2026): Standard pluggable optical modules will remain the mainstream solution, supporting smooth upgrades for most data center deployments.

Mid Term (2027+): External light source pluggable architectures are expected to achieve rapid adoption in large-scale AI clusters by balancing deployment flexibility and power optimization

Long Term (2027+): With the maturity of Silicon Photonics technology and standardization progress, NPO solutions are expected to become a major architecture for AI supercomputing interconnects, providing the foundation for future 3.2T and 6.4T network evolution.

4.Enabling Ultra-Low Latency All-Optical Switching at Critical Network Nodes with AWGR + EDFA / AWGR + SOA Architectures

4.1 AWGR (Arrayed Waveguide Grating Router)

AWGR is a passive wavelength routing engine that utilizes its cyclic wavelength routing characteristics to deterministically map different optical wavelengths within a WDM signal to corresponding output ports.

Unlike traditional electrical switching architectures, AWGR does not require lookup tables, packet scheduling and optical buffering.

Therefore, it completely eliminates the traditional optical-electrical-optical (O-E-O) conversion process in electrical switching systems.

The optical signal remains entirely in the optical domain throughout the transmission process.

A single-stage optical switching operation introduces only nanosecond-level latency, which is:

• 2–3 orders of magnitude lower than traditional OEO architectures
• Highly deterministic with extremely low latency jitter

This capability makes AWGR-based optical switching highly suitable for:

• AI computing clusters
• Low-latency computing networks
• High-performance computing scheduling applications

4.2 AI Computing Cluster AWGR + EDFA Optical Switching Topology

1. Architecture Overview

This architecture is mainly designed for data center inter-rack optical switching and cross-campus long-distance all-optical switching hubs.The topology adopts a three-level flattened architecture:

Compute Access Layer → Core Wavelength Switching Layer → Optical Amplification Output Layer

Access Layer

• Each AI computing node / GPU server outputs optical signals through:
• 100G PSM DWDM4 (C-BAND) optical modules
• Each optical port directly carries:
• Four fixed C-band wavelengths
• The optical signals are then aggregated through a:
• DWDM multiplexer (MUX)

Core Switching Layer

• After wavelength multiplexing, signals are transmitted into an:
• N×N AWGR wavelength router
• The AWGR performs optical routing switching based on wavelength assignment.
• The switching process is completed entirely in the optical domain.

Optical Compensation Output Layer

• After AWGR switching, the system experiences approximately:
• 8dB inherent insertion loss
• An EDFA (Erbium-Doped Fiber Amplifier) is used to compensate for this optical loss.
• The amplified signal is then transmitted to:
• Next-stage switching nodes
• Target computing clusters
• Supporting transmission distances at the:
• 10km level

2. Topology Characteristics

Key advantages include:

• No multi-stage O-E-O conversion
• Core switching latency below 1μs
• Simplified network architecture
• Suitable for large-scale computing hubs with relatively stable network topology

Technical Parameter Comparison

3. AI Computing Cluster AWGR + SOA Optical Switching Topology

This architecture is mainly designed for:

• In-rack optical switching
• Same data center high-density optical switching hubs
• Ultra-low latency AI cluster interconnects

The topology adopts a compact architecture combining:Active Scheduling + All-Optical Switching + Integrated Optical Amplification

Wavelength Scheduling Layer

Each computing node connects to:

• O-BAND DWDM optical components
• O-BAND multi-wavelength tunable optical engines

The scheduling controller dynamically adjusts output wavelengths according to GPU communication requirements, including Gradient synchronization and Parameter broadcasting.

FIBERSTAMP provides O-BAND DWDM parallel optical modules with different baud rates to support medium-distance AI computing interconnect applications.

Core Optical Switching Layer

The dynamically scheduled wavelength signals are transmitted into:

AWGR wavelength routers

The AWGR performs:

• Wavelength-based optical routing
• Nanosecond-level optical path switching

Integrated Optical Amplification Layer

The architecture uses:

SOA (Semiconductor Optical Amplifier)

for amplification of weak optical signals after switching.

Compared with EDFA, SOA provides:

• Smaller form factor
• Better integration capability
• Suitability for high-density rack deployment

SOA can also assist with:

• Wavelength conversion
• Enhanced scheduling flexibility

Topology Characteristics

The complete switching process latency can be reduced to:

• Below 100 nanoseconds
• The power consumption of a single optical switching chip is approximately:
• 1/10 of a comparable electrical switching ASIC

This architecture is highly suitable for:

• Large-scale AI training clusters
• Thousands of GPU interconnect environments
• Low-latency east-west GPU communication

The network architecture diagram

Key Node Selection Recommendations

Download the Full White Paper → https://www.fiberstamp.com/brochures/Next-Generation-AI Computing -Network -Architecture.pdf

The post Next-Generation AI Computing Network Architecture and Optical Interconnect Technology Analysis first appeared on FIBERSTAMP.

With the rapid scaling of AI training and inference clusters, data center interconnect architectures are evolving into a clearly defined layered model.

Modern computing networks are generally divided into two distinct layers:

Scale-Across Network (Short-to-Medium Reach Interconnects)

This layer connects computing nodes across racks, cabinets, and within data halls, typically spanning distances from hundreds of meters to a few kilometers. It is highly latency-sensitive and cost-sensitive, forming the foundation of GPU/NPU cluster interconnects.

Computing Backbone Network (Long-Haul Interconnects)

This layer enables inter-data center and inter-city resource coordination over distances ranging from tens to thousands of kilometers. It requires high spectral efficiency and long-distance transmission capability, where coherent optical technology is essential.

These two network layers impose fundamentally different requirements on optical interconnect technologies. While coherent optics is indispensable for long-haul transmission, Scale-Across networks do not require coherent architectures. In these scenarios, the added complexity, power consumption, and latency of coherent systems become unnecessary overhead.

2. Why O-Band Incoherent for Scale-Across Networks

The O-Band spectrum (1260–1360 nm) provides an optimal operating window for short-to-medium reach optical interconnects in data center environments.

Zero-Dispersion Operation Window

O-Band operates near the zero-dispersion region of standard single-mode fiber, eliminating the need for dispersion compensation. This enables robust signal integrity and supports high-speed PAM4 modulation without DSP-based dispersion equalization.

Ultra-Low Latency Architecture

By removing coherent DSP processing, O-Band incoherent systems significantly reduce end-to-end latency. This is particularly critical for AI workloads such as All-Reduce operations and distributed training synchronization.

Lowest Total System Cost

O-Band incoherent architectures eliminate the need for local oscillator lasers, 90-degree optical hybrids, and complex DSP engines. This significantly reduces system BOM cost while enabling silicon photonics-based implementation.

In Scale-Across applications, O-Band incoherent solutions deliver the optimal balance of cost, power efficiency, and latency.

3. Current Product Capability: Scalable to 800G

The current single-wavelength 100G O-Band incoherent architecture supports seamless scaling up to 800G interconnect bandwidth.

Future 800G implementations can be built on mature single-channel 200G PAM4 technology, offering a low-risk and highly manufacturable solution path with proven system stability.

4. 1.6T Scale-Across Evolution Pathways

As interconnect bandwidth evolves toward 1.6T-class systems, three viable architectural approaches are identified, each with different maturity levels and design trade-offs.

Path 1: 1.6T PSM DWDM (Single-Wavelength 400G PAM4, Silicon Photonics)

This represents a high-performance single-module architecture based on advanced silicon photonics modulation.

While 400G single-wavelength PAM4 DSP technology has not yet reached mass production, 1.6T-class DR4 samples have already emerged in the industry, indicating early feasibility of 400G PAM4 DSP development.

This path is considered a mid-term evolution direction as the ecosystem matures.

Path 2: 1.6T Dual-Module Aggregation (Single-Wavelength 200G PAM4)

This architecture is based on mature 200G PAM4 silicon photonics technology, achieving 1.6T bandwidth through aggregation of two 800G-class optical engines.

While technically feasible, total system power consumption becomes the primary constraint. If power exceeds 30W, direct switch-port powering is no longer viable, requiring additional power delivery mechanisms and compromising pluggable module simplicity.

As a result, this approach is suitable for specific subsystem deployments but is unlikely to become the mainstream Scale-Across architecture.

Path 3: 1.6T NPO Architecture (Recommended)

The Near-Package Optics (NPO) architecture integrates the optical engine close to or within the switch ASIC package, fundamentally addressing both power delivery and signal integrity limitations.

This represents the most practical and scalable path for 1.6T Scale-Across systems at the current stage.

Key advantages include:

• Ultra-short electrical trace lengths, significantly reducing SerDes power consumption
• Removal of pluggable module power constraints
• Based on proven 2×PSM DWDM architecture with a clear evolution roadmap
• Enables full realization of 1.6T O-Band incoherent Scale-Across systems

5.Comparative Summary of Technology Pathways

6.Conclusion

Scale-Across computing networks are defined by four fundamental requirements: low latency, low cost, high port density, and operational simplicity.

In short-to-medium reach interconnect scenarios, the complexity introduced by coherent optical systems is unnecessary and inefficient. O-Band incoherent architectures naturally align with these system-level requirements.

FIBERSTAMP O-Band incoherent solutions provide a production-ready and scalable platform:

• 400G and 800G PSM DWDM architectures are already mature for large-scale deployment
• 1.6T-class systems can be achieved through continued architectural innovation

FIBERSTAMP delivers next-generation O-Band incoherent optical interconnect solutions designed for AI-scale computing infrastructure, enabling high-density, low-latency, and cost-optimized Scale-Across networks.

The post FIBERSTAMP O-Band Incoherent Technology Solution ——O-Band Incoherent Architecture for Scale-Across Computing Networks first appeared on FIBERSTAMP.

In parallel with the office relocation, FIBERSTAMP also announced the launch of its Singapore manufacturing initiative under the Trade Agreements Act (TAA), further strengthening the company’s global supply chain and advanced manufacturing strategy while enhancing the delivery of highly reliable optical interconnect solutions for AI data centers, cloud computing, telecommunications networks, and government-related markets.

Construction of the project is scheduled to begin in June 2026, with production operations expected to commence in December 2026.

The Singapore manufacturing project represents a significant milestone in FIBERSTAMP’s global expansion strategy. The facility will focus on the manufacturing of high-speed optical transceivers, Active Optical Cable (AOC) products, and high-density optical interconnect solutions. The project will also support system integration, automated testing, quality assurance, and New Product Introduction (NPI) operations, establishing an advanced manufacturing platform aligned with international standards.

By establishing localized manufacturing capabilities in Singapore, FIBERSTAMP aims to further strengthen:

• TAA-compliant supply capabilities
• Supply chain transparency and traceability
• Global logistics and delivery efficiency
• Manufacturing reliability and quality control
• Customized support for AI data center customers

FIBERSTAMP believes the new TAA manufacturing facility will contribute to the development of a globally competitive advanced optical communications manufacturing ecosystem in Singapore while helping key customers address growing concerns related to supply chain security, compliance, and market uncertainty.

The post FIBERSTAMP Announces Office Relocation and Official Launch of Singapore TAA Manufacturing Initiative first appeared on FIBERSTAMP.

48G SDI Parallel Optical Module Solution for 8K Transmission

FIBERSTAMP’s 4×12G-SDI QSFP+ optical module solution leverages a 48G QSFP+ PSM4 transceiver to enable uncompressed 8K video transmission over single-mode fiber with distances of up to 20 km.

A compact fiber converter integrates four optical extenders and four 12G-SDI optical modules into a single mini box system, simplifying deployment while ensuring stable and efficient long-distance transmission.

Key Features:

• 48G QSFP+ PSM4 optical module supporting 4 independent single-mode fiber links
• 4 independent SDI channels (12G/6G/3G/1.5G/270M) with automatic data rate detection
• Supports uncompressed 8K transmission up to 20 km
• Up to 2160p/60Hz per channel with independent reclocking
• Compliant with SMPTE ST 2082-1 / 2081-1 / 424 / 292 / 259, DVB-ASI, and MADI standards
• Built-in cable equalizer (Tx) and clock data recovery (CDR) (Rx)

Applications:

Live broadcasting, 8K display systems, professional video production, and surveillance

O-Band 12G SDI DWDM SFP Solution for Long-Haul Transmission

FIBERSTAMP also introduces its O-Band 12G-SDI DWDM SFP solution, supporting up to 16 wavelengths with 150 GHz spacing. Equipped with a high-sensitivity APD receiver, the solution enables transmission distances of up to 30 km, making it ideal for long-distance HD video transport and real-time content distribution.

Exhibition Information

FIBERSTAMP invites industry professionals to explore its latest innovations in high-performance SDI optical transmission at NAB Show 2026. Visit booth N1569 for live demonstrations and firsthand insights into next-generation 8K video transport solutions.

• Booth No.: N1569
• Date: April 19–22, 2026
• Location: Las Vegas Convention Center

FIBERSTAMP continues to advance high-performance, low-power, and scalable optical interconnect technologies, supporting the global media and entertainment industry in its transition toward the 8K ultra-high-definition era.

The post FIBERSTAMP Showcases 48G SDI Optical Interconnect and O-Band 12G SDI DWDM Solutions at NAB Show 2026 first appeared on FIBERSTAMP.

Traditionally, the C-band has dominated long-haul transmission. However, for DCI “last-mile” applications spanning 2 km to 30 km, its cost structure is increasingly difficult to justify. FIBERSTAMP’s O-band (1310 nm) DWDM technology, with its naturally low-dispersion transmission window, establishes a new benchmark for cost-efficient 400GE data center interconnects.

400G QSFP-DD PSM DWDM4 Optical Module

Key Advantages:

DCM-Free Operation: Operating within the O-band’s low-dispersion window eliminates the need for bulky and costly dispersion compensation modules (DCM), simplifying line card design while reducing insertion loss.

Ultra-Low Power Consumption: Advanced silicon photonics integration enables industry-leading power efficiency, making the solution ideal for high-density data center deployments.

Cost-Optimized Architecture: For short- to mid-reach DCI applications, the solution avoids the complexity of coherent C-band transceivers, providing a high-performance direct-detect architecture that significantly reduces CapEx.

Ultra-Low Latency: By eliminating DSP-based dispersion compensation required in coherent optics, the module greatly reduces optical transmission latency, enabling faster data center interconnect performance.

Product Brief Description

400G QSFP-DD DWDM4 O-Band DCI Applications (10–30 km)

OFC 2026 Live Demonstration

FIBERSTAMP warmly invites visitors to our booth for a live end-to-end demonstration of the O-band 400G DWDM4 transmission system. The demonstration will feature:

• 400G DCI chassis
• 400G QSFP-DD OEO line cards
• 200 GHz O-band DWDM MUX/DEMUX modules

FIBERSTAMP provides a complete turnkey solution, demonstrating how the O-band architecture can reduce network deployment costs by approximately 50% while delivering efficient and scalable DCI connectivity.

Event: OFC 2026, Los Angeles, CA, USA

FIBERSTAMP Booth: #2416

Live Demo: “O-Band 400G DWDM4 Transmission in Action”

Redefining Cost-Effective 400G Transmission. See you at OFC 2026!

The post Paving the Way for Cost-Effective DWDM Transmission — FIBERSTAMP Showcases O-Band 400G DWDM4 Direct-Detect Optical Module and Subsystem at OFC 2026 first appeared on FIBERSTAMP.

FIBERSTAMP Booth: #2416

Live Demonstration of the 1.6T DR16-NPO Silicon Photonics Engine

The 1600G NPO DR16 silicon photonics engine, built on linear direct-drive technology, represents one of FIBERSTAMP’s key innovations for the next generation of optical networking.

The solution adopts a linear silicon photonics engine architecture, utilizing a socket-based packaging design combined with LPO linear direct-drive technology and advanced flip-chip bonding processes.

Compared with conventional NPO/CPO architectures, the linear NPO silicon photonics engine eliminates the DSP, significantly reducing system-level power consumption and overall cost.

Key Performance Specifications

Transmitter

The transmitter demonstrates excellent optical eye performance with a typical TDECQ of only 2.2 dB. The solution is fully compliant with the IEEE 802.3bs DR4 standard and enables seamless interoperability with conventional DSP-based DR4 optical modules, supporting hybrid deployment between new and legacy architectures.

Receiver

At a BER of 1E-6, the receiver sensitivity across all channels is better than −5 dBm, ensuring sufficient link budget for stable high-speed transmission.

Launch of HYBRID Green Interconnect Innovations at OFC 2026

The 800G OSFP HYBRID product family differs from traditional full-DSP optical modules (DPO). By utilizing DSP processing on only half of the channels, the HYBRID architecture significantly improves both power efficiency and latency performance.

HYBRID optical modules and active optical cables draw inspiration from general design methodologies used in LPO and LRO architectures. From the perspective of strict system-level signal alignment, however, HYBRID introduces a more advanced design strategy that balances performance, power consumption, and deployment flexibility.

HYBRID Green Interconnect Products Demonstrated at OFC 2026

• 800G OSFP HYBRID ACC+
• 800G OSFP HYBRID VR8-AOC
• 800G OSFP HYBRID PSM8-AOC
• 800G OSFP-PHO 2×DR4

FIBERSTAMP HYBRID Architecture Patent Overview

HYBRID Architecture: Advantages and Key Considerations

1. Key Advantages of HYBRID

Significant Power Reduction:

Approximately 20–30% lower power consumption compared with full-DSP solutions

Ultra-low Link Latency:

With only half the DSP processing, latency is reduced by approximately 50%, approaching performance levels similar to LRO architectures.

Reliable Signal Quality:

• Multimode 50 m: PRE-FEC BER E-7 / E-8
• Single-mode 500 m: PRE-FEC BER E-10

Optimized Cost Structure:

Overall system cost can be reduced by approximately 20% compared with traditional DSP-based architectures.

Higher Channel Density Capability:

Provides a feasible architecture for 16-channel / future 3.2T pluggable optical modules.

2. Limitations and Engineering Considerations

Non-DSP receiver channels require slightly tighter host-side SI tuning.

System-level co-optimization is required rather than simple plug-and-play deployment

Large-scale commercialization is still in its early stage and requires close collaboration with ecosystem partners.

Nevertheless, compared with LPO and LRO architectures, the engineering risks associated with the HYBRID architecture are significantly more manageable.

Advancing Next-Generation Optical Interconnects

The HYBRID architecture achieves a balanced optimization across power consumption, latency, cost, and performance, making it a promising technology pathway for next-generation high-speed optical interconnects.

As demand for AI infrastructure and hyperscale computing networks continues to grow, FIBERSTAMP will continue advancing silicon photonics technologies, linear-drive architectures, and green interconnect solutions. The company looks forward to working closely with switch vendors, system providers, and end users to accelerate the large-scale deployment of 800G and 1.6T optical interconnect technologies, enabling scalable and energy-efficient next-generation data center networks.

The post OFC 2026 — Live Demonstration of the 1.6T DR16-NPO Silicon Photonics Engine and HYBRID Green Interconnect Innovations first appeared on FIBERSTAMP.

The awarded products include:

• 800G OSFP HYBRID ACC+ — Rated 4.0/5.0
• 1.6T OSFP224 HYBRID PSM8-AOC-SiPho — Rated 4.0/5.0
• 800G OSFP HYBRID VR8-AOC — Rated 3.5/5.0

This recognition underscores industry validation of FIBERSTAMP’s pioneering advancements and meaningful contributions to hybrid-architecture interconnect innovation.

Breakthrough HYBRID Electrical Architecture: 800G OSFP HYBRID ACC+

Designed for commercial interconnects exceeding 5 meters, the 800G OSFP HYBRID ACC+ delivers approximately 50% lower latency and cost compared to traditional AEC architectures.

Key Technical Highlights:

• Efficient Architecture: Utilizes 16 copper pairs to enable 8-channel 112G PAM4 electrical interconnects, requiring only a 4-channel DSP per end—compared to traditional AEC solutions that require 8-channel DSPs.
• Superior Signal Performance: Achieves a target pre-FEC BER better than 1E-8, significantly enhancing system SNR and receive eye quality.
• Lower Power Consumption: Typical power consumption is approximately 7W per end, about 40% lower than conventional AEC solutions (~12W per end).
• Cost and Latency Optimization: Delivers roughly 50% improvement in both cost and latency compared to traditional AEC architectures, outperforming standard ACC designs.

Lightwave Judge’s comment: “The performance and power savings enabled by the Fiberstamp 800G OSFP HYBRID ACC+ introduce a better solution for today’s ACC applications at 800G/port speeds.”

Advancing 1.6T Interconnects with Silicon Photonics: 1.6T OSFP224 HYBRID PSM8-AOC-SiPho

Built on an advanced silicon photonics (SiPho) platform, the 1.6T OSFP224 HYBRID PSM8-AOC-SiPho is engineered for high-performance data centers and AI compute clusters. The module supports transmission distances of at least 500 meters over single-mode fiber (SMF).

Key Performance Specifications:

• High-Speed Transmission: Supports ≥500m over SMF.
• Lower Power Consumption: Maximum power consumption below 21W, approximately 20% lower than traditional DSP-based solutions.
• Ultra-Low Latency: Reduces link latency by around 50% compared to conventional DSP AOC architectures.
• Excellent Signal Integrity: Achieves a pre-FEC BER of 1E-8 over a 500m SMF link.

Lightwave Judge’s comment:  “This product provides an economic solution before 200G VCSEL becomes viable.”

High-Efficiency Multimode Connectivity for AI Deployments: 800G OSFP HYBRID VR8-AOC

The 800G OSFP HYBRID VR8-AOC is engineered for next-generation data center and AI-driven applications, supporting multimode fiber connectivity.

Core Features and Benefits:

• High-Speed Performance: Supports up to 30m over OM3 and 50m over OM4 multimode fiber (with KP4-FEC enabled).
• Lower Power Consumption: Consumes less than 9W, approximately 30% lower than traditional DSP solutions.
• Reduced Latency: Cuts link latency by roughly 50% compared to conventional DSP-based AOCs.
• Superior Signal Quality: Achieves pre-FEC BER levels of E-7/E-8 over a 50m OM4 link.
• Cost Advantage: Overall system cost reduced by approximately 21% compared to existing DSP solutions.

Lightwave Judge’s comment: “A winning combination: High capability, low power consumption, ultra-low latency.”

Powering the Future of AI and Data Center Infrastructure

The 2026 Lightwave Innovation Award recognition reinforces FIBERSTAMP’s commitment to advancing HYBRID interconnect architectures and silicon photonics technologies. By optimizing DSP architecture, energy efficiency, and system design, FIBERSTAMP continues to enable scalable, low-latency, and cost-effective connectivity solutions for global data centers and AI infrastructure.

The post FIBERSTAMP Wins 2026 Lightwave Innovation Award — HYBRID 800G ACC+, 800G AOC, and 1.6T Silicon Photonics Active Optical Cables Honored first appeared on FIBERSTAMP.

Product 1: 800G OSFP HYBRID ACC+ Active Copper Cable

The 800G OSFP HYBRID ACC+ Active Copper Cable is built on a HYBRID half-DSP architecture, in which DSP-based signal compensation is implemented on only one side of the link—either the host side or the line side. This design maintains high-speed signal integrity and link stability while significantly reducing power consumption, link latency, and overall system cost.

The product was characterized and tuned using FIBERSTAMP’s in-house checker test platform and was successfully validated on an NVIDIA 800G InfiniBand switch platform. Test results confirm full compatibility with 800G switch ports at a transmission distance of 5 meters, with the following performance metrics:

• Data Rate: 800 Gbps (8 × 100G)
• Maximum Reach: ≥ 5 meters
• Typical Power Consumption: ~5.5 W per end
• Link Latency (5 m): ~100 ns
• Pre-FEC BER: Stable at the 1E-9 level
• Post-FEC BER: Up to 1E-15 or better
• Eye Opening Info FOM: Majority of channels above 70

Compared with conventional AEC solutions under equivalent transmission conditions, HYBRID ACC+ delivers approximately 40% improvement in power efficiency, latency, and cost, providing a high-performance and cost-effective short-reach interconnect option for high-density data center deployments.

As the HYBRID solution adopts a half-DSP architecture, achieving optimal system-level performance typically requires joint tuning and validation with original equipment manufacturers (OEMs) during deployment.

Product 2: 800G OSFP-PHO 2×DR4 Silicon Photonics Module Based on HYBRID Architecture

FIBERSTAMP also showcases its 800G OSFP-PHO 2×DR4 silicon photonics module, designed on the HYBRID architecture. The module supports configurations from 800G OSFP112-PHO 2×DR4 to 2 × 400G DR4 (QSFP112 / OSFP-RHS), addressing 500-meter-class short- to mid-reach optical interconnect requirements in data center environments.

Key technical features include:

• Module Power Consumption: < 12.5 W, approximately 20% lower than traditional full-DSP optical modules.
• Transmission Reach: Up to 500 meters over single-mode fiber (SMF) with KP4-FEC enabled.
• Link Latency :  Approximately 50% lower than conventional DSP-based architectures.
• Signal Quality: Pre-FEC BER reaching the E-10 level.

High-Temperature Fiber Transmission BER

Experimental results demonstrate that HYBRID half-DSP technology can effectively compensate for channel loss, making high-performance, cost-efficient 800G optical interconnect upgrades technically feasible for hyperscale data centers and cloud service providers.

Under the current LRO operating mode, the receiver link still exhibits a limited post-correction symbol margin (slightly above 10), which requires collaborative system-level tuning with OEM partners to further optimize end-to-end link performance.

Invitation to DesignCon 2026

FIBERSTAMP cordially invites media representatives, industry analysts, and partners to visit DesignCon 2026 (Booth #1456) to explore these two innovative solutions and engage in technical discussions.

The company also looks forward to working closely with customers and ecosystem partners to jointly advance the HYBRID pluggable green interconnect product portfolio, enabling HYBRID design methodologies to move beyond laboratory validation and deliver tangible benefits to AI and data center computing infrastructure.

The post FIBERSTAMP Demonstrates 800G HYBRID ACC+ Active Copper Cable and 800G HYBRID Silicon Photonics Module at DesignCon 2026 first appeared on FIBERSTAMP.