OPTICAL OSCILLATOR AND RECORDING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an optical oscillator capable of readily and simply obtaining desired pulsed light-frequency.SOLUTION: The optical oscillator comprises a supersaturation-absorber part having a double quantum well separation containment heterostructure made of GaInN/GaN/AlGaN material, and for applying negative bias voltage; a self-exciting oscillation semiconductor laser 1 having a gain part for injecting gain current; a light separating means 3 for separating a part of laser light from the self-exciting oscillation semiconductor laser 1; a light receiving element 5 for receiving laser light separated by the light separating means; and a current limiting circuit 6 for controlling current injected into the gain part of the self-exciting oscillation semiconductor laser 1 based on an amount of laser light received by the light receiving element 5.