4x25Gb/s TOSA for 100 Gigabit Ethernet

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Broadcom’ AFCP-T4X25EL-Series TOSA is a cooled, 4x25Gb/s, 1310nm transmit optical sub-assembly, consisting of four high reliability, high performance EML lasers and an optical multiplexer to combine the outputs from the four lasers. These elements are packaged in an hermetic, planar package with an LC receptacle. The electrical interface is through two flex connects. The TOSA is intended for use in CFP, CFP2 and CFP4 modules, serving the 100GBASE-LR4 application, per the IEEE 802.3ba standard.


  • Four high-reliability, high performance electro-absorptive modulated 1.3μm (EML) lasers
  • -5 to +75°C case operating temperature range
  • 25.78125Gb/s data rate for each channel
    • Capable of 27.952Gb/s operation
  • Mechanical design suitable for CFP, CFP2 and CFP4 applications
  • Suitable for transmission distances up to 10km
  • LC receptacle, with integrated optical isolator, electrically isolated from TOSA body


  • 100Gb/s CFP transceivers
  • 100Gb/s CFP2 transceivers
  • 100Gb/s CFP4 transceivers

Lifecycle Status


Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Active
Distrib. Inventory No
Form Factor CFP4 Compatible
Connector Type LC receptacle
Fiber Type Single Mode
Maximum Distance (km) 10
Nominal Optical Wavelength (nm) 1310
Emitter EML
RoHS6 Compliant Y