Lasers, Fiber Optics, and Communications

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

[+] Author Affiliations
Baoquan Yao, Xiaolei Li, Zheng Cui, Tongyu Dai, Shuang Bai, Hongyu Yang, Xiaoming Duan, Youlun Ju

Harbin Institute of Technology, National Key Laboratory of Tunable Laser Technology, Room 328, Building No. 2A, No. 2, Yikuang Street, Nangang District, Harbin 150001, China

Opt. Eng. 54(7), 076105 (Jul 21, 2015). doi:10.1117/1.OE.54.7.076105
History: Received May 7, 2015; Accepted June 24, 2015
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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.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Baoquan Yao ; Xiaolei Li ; Zheng Cui ; Tongyu Dai ; Shuang Bai, et al.
"High-repetition rate passively Q-switched Ho:YLF laser with graphene as a saturable absorber", Opt. Eng. 54(7), 076105 (Jul 21, 2015). ; http://dx.doi.org/10.1117/1.OE.54.7.076105


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