He-Ne激光器采用内置法布里-珀罗(F-P)标准具的方法可以获得与633 nm 紧邻的629 nm谱线，这是用传统的镀膜方法无法实现的。分析了由于激光腔内的温度变化引起的629 nm谱线透射窗口的移动。为了得到稳定的629 nm波长输出，估算了F-P标准具的角度调节范围下限。提出了一种大角度范围的压电角度调节机构，应用于F-P标准具的角度调节。同时采用反馈控制算法实现了629 nm波长的稳定输出，稳定输出功率约80 μW。

629 nm spectral line can be obtained with the method using Fabry-Perot (F-P) etalon in He-Ne laser cavity. That spectral line is hard to realize by the traditional method, like coating film. The shifting of 629 nm line′s transmission window in F-P etalon is analyzed. In order to obtain a stable 629 nm output, the lower limit of the F-P etalon′s angle range is calculated. A new folding piezoelectric angle controller is presented, which can provide a wide angle range adjustment. A stable output 629 nm He-Ne laser is realized with a feedback control. The stable output light power reaches 80 μW approximately.