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Coherent / Finisar Transceivers

FTLC9558REPM

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Optical Communication Products — Data Center SR/DR/FR

100G SR4 QSFP28 Optical Transceiver

Powered by Coherent — Part No. FTLC9558REPM

The FTLC9558REPM is a 100GBASE-SR4 QSFP28 optical transceiver delivering 100 Gb/s Ethernet over parallel multi-mode fiber with 100 m reach. Based on 4×25G VCSEL channels at 850 nm with an MPO (MTP12) interface, it is optimized for short-reach data center interconnects, ToR-to-server, and switch uplinks.

100G SR4100 m MMF850 nm VCSELQSFP28 MSA103.1 Gb/sMPO (MTP12)
Manufactured by Coherent. Available through APEX — contact us for pricing, configuration guidance, and delivery options.

Key Highlights

100G SR4 Short-Reach

4×25G parallel optics at 850 nm deliver 100GBASE-SR4 over 100 m of OM4 multi-mode fiber, ideal for intra-rack and adjacent-rack data center links.

QSFP28 Form Factor

Industry-standard QSFP28 MSA compliant, hot-pluggable, and backward-compatible with 25G/40G QSFP+ ports for flexible migration.

Digital Diagnostics

Full DDM via I2C interface per QSFP28 MSA — real-time monitoring of temperature, voltage, TX/RX power, and VCSEL bias current.

Standards Compliant

Compliant with QSFP28 MSA and IEEE 802.3bm (100GBASE-SR4 and CAUI-4). RoHS compliant.

Technical Specifications

Optical & Data
Form FactorQSFP28
Data Transfer Rate100G (100GBASE-SR4, 4×25G)
Line Rate103.1 Gb/s
Reach100 m
Media TypeParallel Multi-Mode Fiber (MMF)
Wavelength850 nm band
ConnectorMPO (MTP12)
Transmitter4× VCSEL
ReceiverPIN
Protocol & Compliance
ProtocolGigabit Ethernet (100GBASE-SR4)
MSA ComplianceQSFP28 MSA
IEEE ComplianceIEEE 802.3bm, CAUI-4
EnvironmentalRoHS compliant
Electrical & Environmental
Supply Voltage3.3 V
High End Case Temp70°C
DiagnosticsDigital (DDM via I2C)
Manufacturer
BrandCoherent (formerly Finisar)
Part NumberFTLC9558REPM

Applications

The 100G SR4 QSFP28 transceiver is engineered for short-reach 100G interconnect across:

  • Data Center ToR/Spine — 100G uplinks between top-of-rack and aggregation switches.

  • Server & Storage Interconnect — High-bandwidth links to 100G NICs and storage arrays.

  • Enterprise Core — 100G aggregation in campus and enterprise data centers.

  • Edge & Cloud Racks — Cost-effective short-reach 100G within a single row or adjacent racks.

About This Product

This product is manufactured by Coherent Corp. (formerly Finisar). APEX supplies Coherent optical transceivers through established supply channels. We offer competitive pricing, configuration advisory, and logistics support for customers seeking Coherent networking products.

To inquire about pricing, configuration, or delivery: contact our sales team with your target part number and quantity. Bulk and project pricing available.