红外与激光工程, 2018, 47 (5): 0505003, 网络出版: 2018-09-12   

2 μm波段Tm:YAP晶体半导体可饱和吸收镜连续波锁模激光器

CW mode-locked Tm:YAP laser with semiconductor saturable-absorber mirror at around 2 μm
作者单位
1 济南大学 物理科学与技术学院, 山东 济南 250022
2 山东大学 晶体材料国家重点实验室, 山东 济南 250100
摘要
使用半导体可饱和吸收镜, 实现了光纤耦合半导体激光抽运Tm:YAP晶体的全固态连续波锁模激光运转。根据ABCD矩阵理论设计激光器参数, 通过控制谐振腔的像散和模式分布, 获得了稳定的皮秒锁模激光输出。当最大抽运功率为7.96 W时, 获得锁模激光的最大平均输出功率为0.73 W, 相应的斜效率为15.6%。此时锁模脉冲宽度约为1.7 ps, 对应的重复频率为88.7 MHz, 中心谱线为1 982.4 nm。结果表明: Tm:YAP晶体是一种具有较好的热学、机械性能的2 μm波段超快激光晶体。
Abstract
A passively continuous-wave(CW) mode-locked Tm:YAP laser with a semiconductor saturable-absorber mirror was reported by using laser-diode as pump source. According to the ABCD matrix theory, the astigmatism and the stability in the cavity of the laser were theoretically analyzed. Stable continuous-wave mode-locked ps-pulses were achieved. The average output power of 0.73 W was obtained with the absorbed pump power of 7.96 W and the corresponding slope efficiency was 15.6%. The pulse duration was measured to be 1.7 ps with a repetition rate of 88.7 MHz at the central wavelength of 1 982.4 nm, and the corresponding slope efficiency was 15.6%. The results show that the Tm:YAP crystal has good thermal mechanical properties, which is very favorable for generating ultrashort pulses at around 2 μm.

张海鹍, 黄继阳, 周城, 夏伟, 何京良. 2 μm波段Tm:YAP晶体半导体可饱和吸收镜连续波锁模激光器[J]. 红外与激光工程, 2018, 47(5): 0505003. Zhang Haikun, Huang Jiyang, Zhou Cheng, Xia Wei, He Jingliang. CW mode-locked Tm:YAP laser with semiconductor saturable-absorber mirror at around 2 μm[J]. Infrared and Laser Engineering, 2018, 47(5): 0505003.

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