连续和被动锁模Nd:CGA激光器的实验研究  

Continuous-Wave Passively Mode-Locked Nd:CGA Lasers

作　　者：何坤娜[1,2] 刘家兴[2] 徐晓东[3] 王兆华[2] 李德华[2] 田文龙[2] 徐军[4] 狄聚青[5] 夏长泰[5] 魏志义[2] 

机构地区：[1]中国农业大学理学院,北京100083 [2]中国科学院物理研究所北京凝聚态物理国家实验室,北京100190 [3]江苏师范大学物理与电子工程学院先进激光材料与器件重点实验室,江苏徐州221116 [4]同济大学物理科学与工程学院,上海200092 [5]中国科学院上海光学精密机械研究所强激光材料重点实验室,上海201800

出　　处：《激光与光电子学进展》2016年第10期188-192,共5页Laser & Optoelectronics Progress

基　　金：国家973计划(2013CB922402);国家自然科学基金国际联合研究项目(61210017)

摘　　要：采用X型谐振腔,实验研究了二极管抽运Nd:CGA激光器的连续和被动锁模激光特性。当Nd:CGA激光器实现连续运转时,采用不同透过率的输出镜优化激光器的连续输出功率。采用透射率为20%的输出镜时,获得了1.8 W的最高连续输出功率,斜率效率达到30.8%,中心波长为1079 nm;采用半导体可饱和吸收反射镜作为锁模元件、透射率为1.6%的平面镜作为输出镜,获得了脉冲宽度为2.7 ps、重复频率为177 MHz的被动锁模脉冲输出。当抽运功率为6.9 W时,获得锁模脉冲的最大平均输出功率为524 mW,相应的光光转换效率和斜率效率分别为7.6%和8.0%。The continuous wave （CW） and passive mode-locking features of a diode-pumped NdtCGA laser are experimentally demonstrated with a typical X-type cavity. Under the CW operation, different output couplers （OCs） were used to optimize the CW output power of the Nd：CGA laser. With the OC of 20% transmission, the maximum CW output power of 1.8 W is achieved and the slope efficiency is 30.8% at the central wavelength of 1079 nm. By employing a semiconductor saturable absorber mirror for passive mode-locking, pulses as short as 2.7 ps with 177 MHz repetition rate are achieved for OC with transmission of 1.6%. The maximum average output power of 524 mW is obtained under a pump power of 6.9 W. The optical-to-optical conversion efficiency and the slope efficiency are 7.6% and 8.0%, respectively.

关 键 词：激光器 二极管抽运 Nd:CGA激光器 连续激光 被动锁模激光 

分 类 号：TN248[电子电信—物理电子学]