1.6T OSFP224 FR4 2KM Transceiver
High-performance 1.6T OSFP224 FR4 2km single-mode fiber transceiver with 2×800G FR4 dual ports, 1310nm CWDM, low power, full IEEE/CMIS compliance for hyperscale DC & HPC.
- Product Introduction
1.6T OSFP224 2×FR4 2km Transceiver
As hyperscale cloud providers, AI training clusters and high-performance computing (HPC) facilities rapidly upgrade from 800G to 1.6T network fabrics, the 1.6T OSFP224 2×FR4 2km optical transceiver emerges as a cost-optimized mid-reach interconnection solution filling the gap between short-reach DR4 modules and long-haul LR4 optics.
1.6T OSFP224 Form Factor & Thermal Optimization
The OSFP224 (OSFP1600) footprint supports 8×200G PAM4 electrical host interfaces, fully backward-compatible with all OSFP-compliant switches, GPUs and InfiniBand XDR NICs. We provide two customizable thermal housing versions for distinct cooling environments:
- IHS/Finned Top: Integrated heatsink design for standard air-cooled AI switches, excellent heat dissipation under continuous 26–30W power draw
- RHS/Flat Top: Low-profile smooth top shell engineered for liquid-cooled rack systems, compatible with cage-mounted auxiliary heat sinks popular in NVIDIA DGX B300 clusters
All mechanical structures pass 1000-cycle hot-plug durability testing, with reinforced metal shielding to eliminate high-speed PAM4 signal crosstalk across adjacent module slots in dense 32-slot OSFP switch linecards.
2×FR4 Twin-Port CWDM Optical Engine (2km SMF Reach)
This module integrates two independent 800GBASE-FR4 optical subassemblies (OSA), forming a combined FR8 twin-port architecture:
- Optical reach: Fixed 2km over ITU-T G.652D single-mode fiber
- Wavelength grid: 4-channel LAN-WDM CWDM 1310nm band per FR4 port
- Modulation: 200Gbps PAM4 per optical lane, pre-FEC BER <1E-9 across full operating temperature range (0℃ ~ +70℃)
- Connector: Dual duplex LC/UPC receptacles; no MPO multi-fiber required
- Laser type: In-house high-bandwidth EML transmitters with low TDECQ (<2dB) and stable extinction ratio (>3dB), avoiding signal distortion in long continuous transmission runs.
A key unique selling point: each 800G FR4 port operates completely isolated. If one optical lane fails due to fiber damage or connector contamination, the second 800G link remains fully functional, delivering built-in link redundancy unavailable on single-port 1.6T DR4 modules for mission-critical AI training workloads.
1.6T OSFP224 2×FR4 2 km Optical Transceiver Specification Table
| Parameter | Value | Unit / Note |
|---|---|---|
| Product Model | OSFP224-1.6T-2FR4-2KM-LC-UPC | Twin-port FR8 (2×800G FR4) architecture |
| Form Factor | OSFP224 (OSFP1600 MSA Rev 5.1) | Hot-pluggable Octal Small Form Factor Pluggable |
| Total Aggregate Bandwidth | 1600 | Gbps (2 independent 800G FR4 channels) |
| Standard Name | 2×800GBASE-FR4 / FR8 PAM4 Transceiver | IEEE 802.3dj compliant |
| Transmission Medium | Single Mode Fiber (SMF) | ITU-T G.652D standard fiber |
| Max Transmission Reach | 2000 | Meters (2km) |
| Optical Connector | Dual Duplex LC/UPC | 2 separate LC duplex ports, 4 fiber strands total |
| Laser Safety Class | Class 1 | IEC 60825-1 certified eye-safe |
| Digital Monitoring | DDM / DOM (CMIS Rev 5.3) | Real-time power, temp, bias, FEC counter telemetry |
| FEC Scheme | KP4-FEC | Low-latency forward error correction |
| Main DSP Chip | 3nm Broadcom Sian3 BCM83628 | Low power PAM4 signal processing |
| Housing Thermal Option 1 | IHS Integrated Heatsink Top | For air-cooled standard switches |
| Housing Thermal Option 2 | RHS Flat Smooth Top | For liquid-cooled NVIDIA DGX clusters |
| Compliance Certifications | IEEE 802.3dj, OSFP MSA Rev5.1, CMIS 5.3, RoHS 2011/65/EU | Interoperable with mainstream cloud switches & InfiniBand XDR |
| Supported System | 1.6T Ethernet, InfiniBand XDR, NVIDIA ConnectX-8, Quantum X800 Switches | AI training clusters, HPC, campus DCI |
1.6T OSFP224 FR4 2km vs 1.6T DR8 MPO 500m
| Parameter | 1.6T 2×FR4 2km (This Module) | 1.6T DR8 MPO 500m Transceiver |
|---|---|---|
| Max SMF Reach | 2000 meters | 500 meters |
| Fiber Connector | Dual Duplex LC (4 fiber strands total) | Dual MPO-12 (24 fiber strands total) |
| Legacy Infrastructure Compatibility | Works with existing LC patch panels | Requires full MPO fiber retrofit |
| Link Redundancy | Independent dual 800G ports | Single shared 1.6T optical lane |
| Typical TCO Per Link | Lower (less fiber, simpler cabling) | Higher (massive MPO cable investment) |
| Ideal Scenario | Inter-pod / campus 0.5–2km links | Short rack-to-rack <500m connections |
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