摘要
本文根据多模激光时间相干性g（1）（τ）的准周期性特点，提出了一种观测多模激光纵横线型函数及其频宽的新方法──程差2kL法。文章介绍了测量原理与方法，并以双模He－Ne激光器为例，给出了相应的实验结果。研究表明，多模气体激光的纵横线型函数为洛仑兹外。（Lorentz）线型函数，相应的纵模频宽约为107Hz。
According to the periodical property of temporal coherence g(1)(τ) in a multimode gas laser, a new method of observing the spectral line-shape function and its frequency width of longitudinal mode in a multi-mode laser is proposed in this paper. The investigation shows that the spectral line-shape function of longitudinal mode in the multimode gas lasers is Lorentz line- shape function, and relative frequency width of longitudinal mode is about 107 Hz.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1996年第6期721-726,共6页
Acta Optica Sinica
基金
江苏省自然科学基金
关键词
纵模线型函数
纵模频宽
多模
激光
时间相干性
spectral line-shape function of longitudinal mode, frequecy width of longitudinal mode, a multi-mode laser, temporal coherence, 2kL method of the optical-path difference
