21 July 2015 High-repetition rate passively Q-switched Ho:YLF laser with graphene as a saturable absorber
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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.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Baoquan Yao, Baoquan Yao, Xiaolei Li, Xiaolei Li, Zheng Cui, Zheng Cui, Tongyu Dai, Tongyu Dai, Shuang Bai, Shuang Bai, Hongyu Yang, Hongyu Yang, Xiaoming Duan, Xiaoming Duan, Youlun Ju, 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 . Submission:
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