实现半导体激光器频率跟踪和锁定的新方法

A novel method for frequency-tracking and locking of laser diode

本文报道实现半导体激光器连续频率跟踪和锁定的一种新方法:利用法拉第反常色散光学滤波器(FADOF)的透射谱作鉴频器,改变法拉第反常色散光学滤波器的磁场强度,实现频率跟踪和稳频.实验得到,当磁场从0.7×10^(-2)T变到2.2×10^(-2)T时,半导体激光器在～2GHz范围内跟踪锁定,其频率稳定度优于2.1×10^(-10)(100ms≤τ≤10s).

We present here a novel method to track and lock the frequency of laser diode using the transmission spectrum of a Faraday anomalous dispersion optical filter (FADOF) as the frequency discrminato. The frequency stability obtained is better than 2. 1 × 10-10for 1 00 ms ≤ τ ≤ 10 s sampling time. And by changing the intensity the intensity of magnetic field from 0. 7× 1 0-2 T to 2. 2 × 1 0 2T, we obtained a continuous frequency scan of more than 2 GHz.