An All Fiber 1.94 µm Nanosecond Pulse Laser Amplified by Highly Tm3+ -Doped Silicon Fibers
ZHOU Ren-Lai1** , REN Jian-Cun2 , YANG Chao1 , JU You-Lun1 , WANG Yue-Zhu1
1 National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 1500802 Naval Aeronautical & Astronautical University, Yantai 264000
Abstract ：We present an all-fiber 1.94 μm nanosecond pulse laser in master oscillation-power amplifier configuration. A dual-FBGs gain-switched Tm3+ -doped fiber laser is built and is used as the seed laser. The output characteristics of the amplifier are studied at different pulse repetition rates, and the maximum output energy of 500 μJ is achieved under incident pump power of 39 W. The emitting spectra are checked at 5 and 10 kHz, and no obvious nonlinear effects are observed in the spectrum of the amplified laser. The beam quality factor is M 2 =2.1±0.03 measured by the traveling knife-edge method, and the laser beam spot is also monitored by an infrared vidicon camera.
收稿日期: 2013-01-10
出版日期: 2013-05-31
:
42.55.Wd
(Fiber lasers)
42.60.Da
(Resonators, cavities, amplifiers, arrays, and rings)
42.60.Lh
(Efficiency, stability, gain, and other operational parameters)
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2013, Vol. 30 
