由于Nd:磷酸盐玻璃的热导率和破坏阀值都比较低,故连续波锈模钕磷酸盐玻璃激光器要求其谐振腔有特殊的设计.本文在谐振腔长度固定的限制下,分析了三元件式谐振腔的特性,并且讨论了连续波主动锁模Nd:磷酸盐玻璃激光器光学谐振腔的设计.我们讨论了在不同参量范围下谐振腔的稳定性范围和特性,并且阐明了有关的最佳参数的范围.给出了谐振腔最佳运转区参数的解析表达式.实验结果与理论预测符合得很好.这个解析式对设计三元件或多元件的任何端面泵浦和锁模谐振腔是很有用的.

Continuous wave mode-locked neodymium phosphate glass laser requires special resonator design since Nd: phosphate glass has low thermal conductivity and damage threshold. We analyze the characteristics of a three-element resonator under the restraint of a fixed resonator length and discuss the design of the optical resonator for the CW actively mode-locked Nd: phosphate glass laser. We discuss the stability ranges and characteristics of resonator under different parameter regions and illustrate the best parameter region of interest. Analytical expressions of resonator parameters for optimum operation regime are given. The experimental results agree well with theoretical predictions. This analysis may be useful for the design of any end-pumped and mode-locked resonator with three elements or more elements.