采用射频频率调制光谱实现半导体激光器稳频  

Frequency Locking of a Semiconductor Laser via Radio-Frequency Modulation Spectrum

作　　者：赵建明[1] 尹王保[1] 赵延霆[1] 肖连团[1] 贾锁堂[1] 

机构地区：[1]山西大学物理电子工程学院量子光学和光量子器件国家重点实验室,山西太原030006

出　　处：《中国激光》2004年第8期935-938,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金 (6 0 0 780 0 9;10 174 0 4 7);山西省青年科学基金资助项目

摘　　要：利用半导体激光器可直接对注入电流进行高速调制的特点 ,将 2 0MHz射频 (RF)信号直接加在半导体激光器的高频调制端口 ,射频信号的一部分经过相移器后 ,与雪崩光电探测器 (APD)所探测的饱和吸收光谱信号进行混频 ,经低通滤波器后产生了类色散曲线 ;将半导体激光器的输出频率稳定在铯原子D2 线的 6S1/ 2 (F =4 ) →6P3 / 2 (F′=5 ) 的超精细跃迁线上 ,实验所测的 10s内典型的频率起伏小于 1MHz;这种稳频技术不需锁相放大器 。The injection current of the diode laser can be modulated by radio frequency (RF) signal. The RF signal of 20 MHz is input to the high frequency modulation port of diode laser, and part of it is phase shifted and mixed with the saturated absorption spectral signal then input to the low pass filter. The resulted similar dispersion signal is used to stabilize the frequency of laser to  6S 1/2 (F=4)→ 6P 3/2 (F′=5) transition of cesium atom and the frequency stability is better than 1 MHz in 10 s. The stabilization technology has the characteristics of lower intensity noise and higher frequency capture range.

关 键 词：激光技术 射频调制 频率稳定 铯原子 半导体激光器 

分 类 号：TN248.4[电子电信—物理电子学]