Custom 200GBASE-SR8 QSFP-DD Module
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NRZ Protocol Stability: Eliminates the latency of PAM4 conversion by operating on eight discrete lanes of 25G NRZ electrical signaling.
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Double-Density Architecture: Deployed in the extended QSFP-DD form factor to dramatically increase front-panel port aggregation on core routers.
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Ultimate Breakout Hub: Purpose-built to fan out a solitary 200G port into eight independent 25GBASE-SR edge connections.
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Cabling Flexibility: Available with either an MPO-16 or an MPO-24 physical interface to match your facility’s specific structured cabling standard.
Product Description
When network architects need to multiply 25G server access without migrating host ASICs to complex PAM4 logic, the 200GBASE-SR8 QSFP-DD is the definitive hardware solution. Rather than upgrading individual lanes to 50G, this 200g transceiver expands the physical contact footprint utilizing a double-row interface to push eight independent 25.78Gbps channels. Engineered at the WolonFiber manufacturing facility, it acts as an unparalleled density-multiplier, radically reducing the physical space and power overhead required to link massive clusters of 25GbE network interface cards (NICs).
Key Features
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Zero DSP Latency: Bypassing Digital Signal Processors in favor of analog 25G NRZ encoding eradicates the microsecond delays detrimental to high-frequency trading networks.
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Rack-Space Consolidation: One SR8 module consolidates the exact traffic load of eight separate 25G SFP28 transceivers, freeing up critical switch real estate.
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Advanced EMI Shielding: The extended depth of the QSFP-DD chassis includes specialized metallic gaskets to suppress electromagnetic interference in heavily populated racks.
Application Scenarios
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Spine routing nodes executing massive 1-to-8 breakout topologies to edge 25GbE servers.
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Enterprise backbones scaling to 200G capacity while retaining legacy NRZ infrastructure.
Technical Specifications
| Specification | Details | Specification | Details |
| Form Factor | QSFP-DD | Vendor Name | WolonFiber |
| Max Data Rate | 206.25Gbps (8x 25.78Gbps) | Modulation | NRZ |
| Wavelength | 850nm | Max Cable Distance | 100m @ OM4 / 70m @ OM3 |
| Connector | MTP/MPO-16 or MPO-24 PC | Media Type | MMF (Multimode Fiber) |
| Transmitter | 8-Lane VCSEL Array | Receiver Type | PIN Array |
| TX Power | -8.4 to 2.4dBm | RX Sensitivity | < -10.3dBm |
| Power Consumption | ≤ 4.0W | Operating Temp | 0 to 70°C (32 to 158°F) |
| Host FEC | RS-FEC | Protocols | QSFP-DD MSA, IEEE 802.3bm |
Engineering FAQs
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Q: Why select a QSFP-DD format for 200G instead of a standard QSFP56?
A: Hardware constraints. If your core chassis only supports 25G electrical lanes and lacks the ASIC capability for 50G PAM4, the 8-lane QSFP-DD is the only physical architecture capable of achieving a 200G aggregated link.
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Q: Does this transceiver rely on KP4 FEC?
A: No. Because the module utilizes standard 25G NRZ optics, it typically operates perfectly using lower-latency RS-FEC (Reed-Solomon).
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Q: Can the SR8 break out into two 100G modules?
A: Yes. By deploying an MPO-24 to dual MPO-12 breakout harness, you can split this single 200G port into two discrete 100GBASE-SR4 zones.
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Q: Which interface is superior: MPO-16 or MPO-24?
A: Optically, they are identical for 8-lane transmission. MPO-24 ensures compatibility with older high-density trunk layouts, whereas MPO-16 is the newly optimized standard for 8-lane arrays.
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