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Optical Engineering

High-repetition rate passively Q-switched Ho:YLF laser with graphene as a saturable absorber
Author(s): Baoquan Yao; Xiaolei Li; Zheng Cui; Tongyu Dai; Shuang Bai; Hongyu Yang; Xiaoming Duan; Youlun Ju
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Paper 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.

Paper Details

Date Published: 21 July 2015
PDF: 4 pages
Opt. Eng. 54(7) 076105 doi: 10.1117/1.OE.54.7.076105
Published in: Optical Engineering Volume 54, Issue 7
Show Author Affiliations
Baoquan Yao, Harbin Institute of Technology (China)
Xiaolei Li, Harbin Institute of Technology (China)
Zheng Cui, Harbin Institute of Technology (China)
Tongyu Dai, Harbin Institute of Technology (China)
Shuang Bai, Harbin Institute of Technology (China)
Hongyu Yang, Harbin Institute of Technology (China)
Xiaoming Duan, Harbin Institute of Technology (China)
Youlun Ju, Harbin Institute of Technology (China)

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