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。
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 frequemey of the locked point can be adjusted continuously in the range of over 200 MHz.
出处
《中国激光》
EI
CAS
CSCD
北大核心
1991年第4期251-254,共4页
Chinese Journal of Lasers
关键词
HE-NE激光器
等离子体
折射率
频率
refractive index of laser plasma, frequency stabilization of laser
