Temperature control device for a semiconductor laser

摘要

A temperature control device for a semiconductor laser comprises a temperature sensitive resistor for detecting the temperature of a semiconductor laser and a Peltier element connected to the semiconductor laser and controlled, with regard to the direction of its heat transmission, in accordance with the resistance value of the temperature sensitive resistor. A single power source of a single polarity low voltage is used as a power source for the Peltier element. The current generated from the single polarity power source has its polarity changed by a bridging amplifier controlled by the resistance value of the temperature sensitive resistor and is supplied to the Peltier element.