SEMICONDUCTOR LASER DEVICE AND METHOD FOR STABILISING THE WAVELENGTH OF A SEMICONDUCTOR LASER DEVICE

摘要

A semiconductor laser device is described comprising an optical emitter and a wavelength locking mechanism arranged to control the temperature of the optical emitter in order to maintain a desired optical wavelength. Also described is a wavelength locking mechanism for a semiconductor laser and a method for stabilising the wavelength of a semiconductor laser comprising monitoring the wavelength of the laser and controlling the temperature of the laser in order to maintain a desired optical wavelength.