气体激光器中的类透镜效应分析

本文讨论了类负透镜介质一般曲面镜光学谐振腔,并用来分析气体激光器中的热透镜效应。对平凹腔连续波二氧化碳激光器进行了模式分析。结果表明,热透镜效应对输出功率和频率特性影响相当大,对基模输出激光器的影响最为突出。最后,简单地讨论了离子气体激光器和某些其它激光器中的可能热透镜效应。

ANALYSIS OF LENSLIKE EFFECTS IN GAS LASERS

The optical cavities of general curved-mirrors with a negative lenslike medium are discussed, and used to analyze the thermal lensing effects in gas lasers. The mode analysis is made for a CW CO₂ laser of a plane-concave cavity. It is shown that the thermal lensing effects have considerable influence on the output and resonance frequencies, particularly for the fundamental mode lasers. Finally, possible thermal lensing effects in ion gas lasers and other lasers are briefly discussed.