The 689nm discrete mode laser diode from the FEBP series is a cost effective, highly
coherent laser source with a typical linewidth of 4MHz. A strained multi-quantum well
discrete mode (DM) laser diode chip is packaged in an industry standard hermetically
sealed TO39 can with integrated thermo-electric cooler (TEC) and thermistor. The
typical optical output power is 2.5mW. A butterfly version with about 1.5mW out of an
SM or PM fiber is in development and will be available soon.

This laser diode is excellently suited for high performance gas sensing and the use in
Sr-based atomic clocks.