中文摘要：

报道了一种基于Er^3＋,Yb3＋∶YAl3（BO3）4晶体的1.5μm固体激光器。为了解决由晶体严重的热效应所导致的激光器转化效率较低以及无法连续运转的问题,对控温炉设计以及抽运光源参数,如调制频率、占空比和腰斑尺寸等,进行了实验优化,从而减小了晶体的热负载,提高了准连续激光器的输出性能。在抽运源调制频率为40Hz,占空比为10%,抽运光腰斑半径为80μm,注入功率为17.6W时,获得了2.6W的准连续1.5μm激光输出,斜率效率为18.1%;同时在抽运功率为5W时,实现了290mW的连续单横模1.5μm激光输出,斜率效率为8.5%。

英文摘要：

A diode-pumped solid-state laser at 1.5 μm by use of the Er^3＋,Yb3＋∶YAl3（BO3）4 crystal is presented.Initially,the laser efficiency is quite low and can not be operated continuously owing to the serious thermal effect.To solve these problems,the oven design and pumping source parameters including operation frequency,duty cycle and waist radius are optimized for reducing the crystal’s thermal deposition.A more efficient quasi continuous-wave（CW） laser which can produce output power of 2.6 W at 1.5 μm is realized when the pumping source is set as modulated frequency of 40 Hz,duty cycle of 10%,pumping waist radius of 80 μm and incident power of 17.6 W.Furthermore,a CW single-transverse-mode laser with output power of 290 mW and slope efficiency of 8.5% is also demonstrated under pumping power of 5 W.