High-repetition rate passively Q-switched Ho:YLF laser with graphene as a saturable absorber

Baoquan Yao; Xiaolei Li; Zheng Cui; Tongyu Dai; Shuang Bai; Hongyu Yang; Xiaoming Duan; Youlun Ju

doi:10.1117/1.OE.54.7.076105

21 July 2015 High-repetition rate passively Q-switched Ho:YLF laser with graphene as a saturable absorber

Baoquan Yao, Xiaolei Li, Zheng Cui, Tongyu Dai, Shuang Bai, Hongyu Yang, Xiaoming Duan, Youlun Ju

Author Affiliations +

Optical Engineering, Vol. 54, Issue 7, 076105 (July 2015). https://doi.org/10.1117/1.OE.54.7.076105

Abstract

A continuous wave (CW) Tm:YAP laser resonantly pumped Ho:YLF laser in CW mode and passive Q-switched (PQS) mode with multilayer graphene as a saturable absorber is reported. A comparison analysis of laser performances with two different output couplers is carried out. In PQS mode, an maximum average output power of 2.26 W is obtained, corresponding to a slope efficiency of 20.7%. The minimum pulse width observed is 651.9 ns with a center wavelength of 2057.16 nm with a 300-mm radius curvature and 50% transmission output coupler. Meanwhile, the maximum pulse repetition frequency of 59.2 kHz is obtained. The beam quality factor of M² was 1.2, which is the near diffraction limit. The results show that multilayer graphene can be used as a saturable absorber in a Ho:YLF laser around a 2-μm wavelength.

Citation Download Citation

Baoquan Yao, Xiaolei Li, Zheng Cui, Tongyu Dai, Shuang Bai, Hongyu Yang, Xiaoming Duan, and Youlun Ju "High-repetition rate passively Q-switched Ho:YLF laser with graphene as a saturable absorber," Optical Engineering 54(7), 076105 (21 July 2015). https://doi.org/10.1117/1.OE.54.7.076105

Published: 21 July 2015

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