双频塞曼He－Ne激光g^（1）（τ）的时谱特性及其可能应用

Time spectrum characteristics of g (1) ( τ ) of double frequency Zeemen He Ne laser and its applications

本文从塞曼激光器典型的频谱结构出发，导出了双频塞曼ＨｅＮｅ激光时间相干度ｇ（１）（τ）在纵模频率漂移效应作用下的时谱公式，分析了相应的时谱特性和频率调谐特性。

In terms of the typical structure in frequency spectrum of Zeemen He Ne laser, a time spectrum formula g (1) ( τ ) (the degree of first order temporal coherence) of the double frequency Zeemen laser is derived, considering of the longitudinal mode frequency drift. These research results show that:(1) because of the effect of line width, the time coherence g (1) ( τ ) has the variation of period τ 0= 1/Δ ν olr ,(2) the variation of time spectrum of g (1) ( τ ) is relative to frequency drift of double frequency mode; (3) the time spectrum characteristics of g (1) ( τ ) can be used in the measurements of the laser parameters or the frequency stabilization of the double frequency lasers.