Lasers, Fiber Optics, and Communications

Stable passively Q-switched Ho:LuAG laser with graphene as a saturable absorber

[+] Author Affiliations
Zheng Cui

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

Baoquan Yao, Xiaoming Duan, Yanqiu Du, Sai Xu, Yuezhu Wang

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. 53(12), 126112 (Dec 19, 2014). doi:10.1117/1.OE.53.12.126112
History: Received August 12, 2014; Accepted November 25, 2014
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Abstract.  We report a continuous wave (CW) Tm:YLF laser-resonantly pumped Ho:LuAG laser in CW mode and passive Q-switched (PQS) mode with multilayer graphene as a saturable absorber. The lasing performance with different output couplers is analyzed. The best result was obtained with 150-mm radius curvature and 10% transmission output coupler. Under the CW mode, Ho:LuAG laser generated a maximum 1.3-W output power at the center wavelength of 2100.65 nm, corresponding to a slope efficiency of 34.6%. In PQS mode, the minimum pulse width observed is 784.7 ns with a center wavelength of 2100.65 nm at the pump power of 5.4 W. Meanwhile, the maximum output power is 0.37 W with a pulse repetition frequency of 47.3 kHz. The results show that the multilayer graphene can be used as a saturable absorber in a Ho3+-doped laser around a 2-μm wavelength.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Zheng Cui ; Baoquan Yao ; Xiaoming Duan ; Yanqiu Du ; Sai Xu, et al.
"Stable passively Q-switched Ho:LuAG laser with graphene as a saturable absorber", Opt. Eng. 53(12), 126112 (Dec 19, 2014). ; http://dx.doi.org/10.1117/1.OE.53.12.126112


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