What are some domestically produced optical modules
Domestic optical modules include SFP, QSFP, QSFP-DD, OSFP, and CFP modules, produced by companies such as ETU-Link, Huawei, and Accelink, supporting speeds from 25G to 1.6T.
Overview of Domestic Optical Modules
Domestically produced optical modules are increasingly developed to reduce reliance on imported components and enhance supply chain security, particularly for data centers, telecom networks, and high-performance computing (HPC) applications . These modules integrate key components such as lasers, modulators, photodetectors, driver ICs, TIAs, and DSP ICs, which determine performance, reliability, and efficiency .
Types and Form Factors
Domestic manufacturers have developed a wide range of optical modules covering multiple form factors:
- SFP and SFP28: Common for 1G, 10G, and 25G short- and medium-reach links, including bidirectional (BIDI) designs for single-fiber transmission .
- QSFP and QSFP28: Used for 40G, 100G, and 400G applications, often in hyperscale data centers .
- QSFP-DD and OSFP: High-density modules supporting 400G and 800G speeds, with emerging 1.6T solutions .
- CFP: Typically for long-reach and metro/backbone networks, supporting coherent transmission.
Key Technologies
Domestic optical modules incorporate advanced chip technologies:
- VCSELs (Vertical-Cavity Surface-Emitting Lasers): Efficient for short-reach data center links .
- EMLs (Electro-absorption Modulated Lasers): Suitable for long-reach metro and backbone networks .
- Tunable Lasers: Enable dense wavelength division multiplexing (DWDM) for flexible high-speed links .
- Mach-Zehnder Modulators (MZM) and Thin-Film Lithium Niobate (TFLN) Modulators: Support PAM4 and QAM high-speed interconnects .
- Photodetectors: PIN diodes and avalanche photodiodes (APDs) convert optical signals back to electrical signals with high sensitivity .
- Silicon Photonics (SiPh) Integration: Combines waveguides, modulators, and photodetectors on a silicon substrate for compact, high-performance modules .
Representative Domestic Manufacturers
- ETU-Link Technology: Offers 25G SFP28 BIDI modules and 100G QSFP28 ZR4 80KM modules, achieving high performance and low power consumption comparable to international standards .
- Huawei and Accelink: Supply cost-competitive SFP and QSFP28 modules for domestic and export markets, covering speeds from 25G to 400G .
- Other domestic players: Focus on 400G, 800G, and emerging 1.6T modules, leveraging silicon photonics and co-packaged optics technologies .
Applications
Domestic optical modules are widely used in:
- Data centers: High-speed interconnects for hyperscale computing and cloud services .
- Telecommunications: 5G fronthaul, midhaul, and backbone networks .
- High-performance computing: Low-latency, high-bandwidth links for AI and HPC workloads . These domestically produced modules are increasingly competitive with international products, offering high-speed performance, cost efficiency, and supply chain resilience.
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