1.3 µm DFB chip in TO Can for Uncooled applications (CWDM)

Currently Viewing:

The Broadcom TO293Bxxx is an hermetically sealed TO can device with integral photo diode for optical output monitoring using a 1310nm single mode edge-emitting laser diode chip family for use in uncooled applications up to 2.7Gb/sec. It supports CWDM wavelengths from 1270 to 1450nm. The laser is mounted into a TO-56 header and hermetic sealed with a specific lens cap.

The laser design is a capped mesa buried heterostructure (CMBH) grown on n-type substrate with multi-quantum well (MQW) active layers and distributed feedback (DFB) grating layer. The facets are coated with an anti-reflectance layer on the front facet and a high reflectance coating on the rear facet.


  • CWDM wavelengths from 1270 to 1450nm
  • Low threshold current
  • High output power
  • TO-56 package with flat window or lensed with a range of focal point options
  • Near Circular beam pattern
  • Long history of proven field reliability
  • Very high reliability design
  • Operating temperature range up to -40C to +85C


  • LR1 SONET/ SDH OC-3/ STM-1, OC-12/STM-4, OC-48/ STM-16
  • Gigabit Ethernet
  • Fibre Channel

Lifecycle Status


Substance Compliance

  • RoHS6
    With Exemptions
Specification Value
Lifecycle Active
Distrib. Inventory No
Data Rate 2.5 Gb/s
Form Factor TO can
Connector Type NA
Fiber Type Single Mode
Maximum Distance (km) N/A
Nominal Optical Wavelength (nm) 1270-1450
Emitter DFB
RoHS6 Compliant Y with exemptions