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Wolon custom 100G QSFP28 PSM4 optical transceiver with MPO interface, parallel single-mode module for high-density data center breakout applications.

Custom 100G QSFP28 PSM4 Module (Parallel Single-Mode)

  • Physical Layer Isolation: Bypasses internal wavelength division multiplexing (MUX), relying on four independent 1310nm DFB single-mode lasers for parallel optical transmission.

  • High-Density Breakout Capability: Natively engineered to divide a single 100G port into four discrete 25GBASE-LR connections, drastically increasing single-mode downlink density.

  • APC Interface Control: Mandates the use of an MTP/MPO-12 APC (8-degree angled physical contact) receptacle to strictly suppress optical return loss below -60dB.

  • Flexible Span Configuration: Factory-calibrated optical power budgets are available to support standard 500-meter limits or customized 2-kilometer extended reaches.

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Product Description

The 100G QSFP28 PSM4 transceiver is specifically architected for high-density single-mode breakout topologies. Unlike CWDM4 modules that multiplex signals over a duplex LC interface, the PSM4 injects four discrete 25Gbps 1310nm beams directly into four separate fiber pairs within an MPO trunk. Stripping away passive multiplexing components reduces internal electro-optical conversion latency. WolonFiber provides customized EEPROM firmware programming, ensuring seamless hardware handshakes with mainstream 100G Spine switch architecture.

Key Features

  • Minimized Insertion Loss: Removing passive MUX/DEMUX components ensures transmit power is delivered directly to the fiber core, maximizing per-watt efficiency.

  • Thermal Efficiency: The standard 500m specification restricts maximum power dissipation to under 3.5W, mitigating cooling loads in hyper-scale spine-leaf deployments.

  • Comprehensive Diagnostics: Supports full DDM/DOM via the I2C interface, allowing administrators to monitor the bias current of all four parallel lasers simultaneously.

Application Scenarios

  • One-to-four direct single-mode connections from core 100G routers to 25G edge access switches.

  • Dense parallel single-mode aggregation networks spanning massive manufacturing or campus environments.

Technical Specifications

Specification Details Specification Details
Form Factor QSFP28 Vendor Name WolonFiber
Max Data Rate 103.1Gbps (4x25G Breakout) Wavelength 4x 1310nm
Reach Options 500m (Standard) / 2km (Custom) Connector MTP/MPO-12 APC Male
Media Type SMF (Single-Mode Fiber) Transmitter 4x DFB Lasers
Receiver Type PIN Array TX Power -9.4 to 2.0dBm
RX Sensitivity < -11.3dBm Power Draw ≤ 3.5W
DDM/DOM Fully Supported Operating Temp 0 to 70°C (32 to 158°F)
FEC Requirement RS-FEC (Host-side) Protocols 100G PSM4 MSA, IEEE 802.3bm

Engineering FAQs

  • Q: Why does the PSM4 module require an APC-polished MPO cable?

    A: 1310nm single-mode lasers are highly susceptible to back-reflection. Standard PC/UPC flat polishes generate back-reflection that can physically damage the transmitter. The APC 8-degree angle deflects returning light into the cladding, ensuring Return Loss (RL) remains optimal.

  • Q: Can a PSM4 module optical link with a 100G CWDM4 transceiver?

    A: Absolutely not. CWDM4 transmits four different wavelengths over a single duplex fiber. PSM4 transmits a single 1310nm wavelength over eight parallel fiber cores. They are physically and optically incompatible.

  • Q: What cabling is required to execute a breakout?

    A: You must deploy an MPO-12 APC to 4x Duplex LC APC/UPC single-mode breakout cable to properly split the 100Gbps signal into four distinct 25GBASE-LR endpoints.

  • Q: Does this transceiver support 112G OTU4 rates?

    A: No. Standard PSM4 modules are designed strictly for 103.1Gbps Ethernet framing protocols.

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