Coherent Module – Application Scenarios & Architecture Features | QSFP-DD 800G
OptechTWMetro Network
High-capacity backbone transmission within a metropolitan area, typically covering distances from 80 km to 600 km.
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Medium-distance high-capacity transport
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Low latency, multi-wavelength, easily scalable
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Suitable for urban backbones, metro optical rings, enterprise private networks
Long-Haul Transmission
High-speed optical transport spanning hundreds to thousands of kilometers, with inline amplification and wavelength routing.
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Ultra-long-distance transmission with DWDM + optical amplification
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High-capacity per wavelength (100G–400G) with tunable capability
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Ideal for national backbones and subsea cable repeater segments
Data Center Interconnect
Point-to-point or mesh optical connectivity between data centers to support cloud services and redundancy.
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Plug-and-play deployment without external transponders
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Low power consumption and high density for rack integration
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Common in hyperscale cloud interconnects (AWS, Google, Azure) and ISP backbone backup links
AI Fabric / HPC Backbone
Ultra-high-bandwidth, low-latency optical fabric connecting AI/HPC clusters across campuses or regions.
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Extremely high bandwidth interconnect for GPU clusters
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Supports CPO or distributed optical architectures
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Can integrate with InfiniBand or high-speed Ethernet fabrics for AI model training and HPC workloads
| Application | Distance | Module Type | Network Elements |
|---|---|---|---|
| Metro Network | 80–600 km | QSFP-DD DCO CFP2-DCO |
DWDM Mux/Demux, ROADM, EDFA |
| Long-Haul Transmission | 600–3000 km | CFP2-DCO QSFP-DD ZR+ |
DWDM Mux/Demux, EDFA, Raman, ROADM, Repeaters |
| DCI | 80–500 km | QSFP-DD DCO (400ZR/ZR+) |
DWDM Mux/Demux, optional EDFA |
| AI Fabric / HPC Backbone | 80–1000 km | OSFP DCO QSFP-DD DCO |
DWDM Mux/Demux, EDFA, low-latency switching |