中国激光, 1991, 18 (4): 251, 网络出版: 2007-11-12
用改变激光等离子体折射率的方法稳定He-Ne激光器的频率
Frequency stabilization of a He-Ne gas laser by controlling refractive index of laser plasma
摘要
本文介绍一种Zeeman He-Ne气体激光器新的稳频方法,通过控制激光等离子体介质的折射率来稳定激光器的频率。系统使用普通单模He-Ne激光管,不需要特殊加工的、带压电陶瓷(PZT)的稳频激光管。由于采用了锁相技术,它的自差拍频率的变化率小于1Hz,其光频的稳定度为2.2×10~(-11)(取样时间τ=10s)。两个月内,频率再现性为2×10~(-8)。频率锁定点可在大于200MHz的范围内连续调谐。
Abstract
This paper describes a new way to stabilize the frequency of a Zeeman He-Ne gas laser. The laser frequency is stabilized by controlling the refractive index of the laser plasma. It dose not need a gas laser tube with a piezoelectric ceramic (PZT) made by special technology. As the phase-locking technology is used in the laser servo system, the self-beat frequency is a constant and the frequency stability is better than 2.2×10-11 (averaging time =10 sec.). The long term frequency fluctuation never exceeded 2×10-8 during two months. The frequency of the locked point can be adjusted continuously in the range of over 200 MHz.
参考文献
谢毅, 吴彝尊, 张小平, 李泽芬. 用改变激光等离子体折射率的方法稳定He-Ne激光器的频率[J]. 中国激光, 1991, 18(4): 251. 谢毅, 吴彝尊, 张小平, 李泽芬. Frequency stabilization of a He-Ne gas laser by controlling refractive index of laser plasma[J]. Chinese Journal of Lasers, 1991, 18(4): 251.