TEMPERATURE COMPENSATION OF LASER DIODES

摘要

An analog circuit for thermal compensation of laser diodes in optical transmitters. A thermistor (32) senses laser diode (LD) temperature and controls a current source (30) which delivers both diode drive current and diode bias current. The novel circuit compensates for both reduction in laser diode output power and rise in threshold current of the laser diode with increasing temperature over a considerable range of operating temperatures.