Data Sheet

3

Outline Drawing

Dimensions (mm)

Figure 1: Outline Drawing

Reliability/Quality

Meets Qualification requirements of Telcordia GR-468-CORE for Central Office environment.

1- Assumes laser die submount held at <35°C by internal thermoelectric cooler, mean forward current of

35mA, and end of life limits based on 10mA increase in Ith and 25% change in laser efficiency. FIT rate data

for other end of life criteria, including minimum extinction ratio requirements, are available upon request.

Instructions for Use – LC25WZ

Pin 1 and Pin 2 Thermistor

The thermistor is used in a control loop in conjunction with the thermo-electric cooler to maintain the laser

submount temperature at the required value for wavelength. Operating current should be less than 100µA to

prevent self-heating errors.

Pin 3 Laser DC bias (-)

Laser bias current (negative with respect to package ground) is applied via this pin which forms one side of

the bias-T connection to the laser cathode.

Pin 4 Monitor anodes, Pin 5 Common Monitor cathode

The back facet monitor provides a mean power reference for the laser and is normally operated with a 5V

reverse bias.