二种单频外腔式He－Ne激光器的自稳频原理再分析

Further analysis of principle of self-stabilized frequency for single-frequency external resonance cavity He-Ne laser

作者用高气压加纵向非均匀磁场获得了二种单频、自稳频高输出功率的外腔式Ｈｅ－Ｎｅ激光器，１ｍ激光器的频率非稳定度为６．１７５×１０￣（－９）（τ≤１０ｓ）和３．３８×１０￣（－９）（τ≤１ｓ）；１．８ｍ激光器的频率非稳定度为１．１×１０￣（－８）（τ≤１ｓ）和２×１０￣（－８）（τ≤１０ｓ），所有数据由中国计量科学院测定。本文是继文献［１］，［８］，［９］和［１０］发表后，对这两种激光器的自稳频原理的再分析。

By adding a inhomogeneous longitudinal magnetic field in the laser cavi-ty, two kinds of the single self-stabilized-frequency He-Ne lasers have been developed. The lasers have the features of the external cavity configuration and high power out-put. Without any external frequency stabilization device , the frequency stability can reach to 6.175× 10￣(-9)(τ≤10s),3. 38× 10￣(-9)(τ<1s) for 1 meter laser and 2. 0× 10￣(-8) (τ<10s),1.1×10￣(-8)(τ<1s ) for 1. 8 meter laser, measured by beat frequency method. From these facts and hmogeneous extension of spectral line of high pressure gas laser , this paper analyzes the basic principles of the self-stabilized-frequency lasers and point out that this method is simple and can be widely used in the measurement de-vices.