一种提高波导CO_2激光器支线分辨能力的方法

一、前言 目前,波导CO_2激光器大多采用红外金属光栅(光栅常数d～1/(150))进行选支,光栅分辨本领不高往往要限制最大可调谐频率范围。光栅分辨本领正比于光斑所复盖的光栅条纹数N。波导激光器光斑较小,因而分辨本领不高,改变腔长容易出现支线跳变,从而也就限制频率调谐范围。通常是采用图1方法来解决这一问题。即将焦距f=b的凸透镜置于Z=f=b处,光栅紧挨透镜放置。其中

A new method for improving line discrimination of CO2 waveguide lasers

Measuring the variation of the output" power of a waveguide CO2 laser with coupling distance for different curvatures of the cavity mirror, a minimal coupling loss point is obtained. Experimental results show that the frequency tuning range can thus be increased.