ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Fiber laser pumped burst-mode operated picosecond mid-infrared laser |
Wei Kai-Hua (魏凯华)a c, Jiang Pei-Pei (姜培培)a, Wu Bo (吴波)a, Chen Tao (陈滔)a b, Shen Yong-Hang (沈永行)a |
a State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 310027, China; b Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China; c College of Life Information Science & Instrument Engineering, Hangzhou Dianzi University, Hangzhou 310018, China |
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Abstract We demonstrate a compact periodically poled MgO-doped lithium niobate (MgO:PPLN)-based optical parametric oscillator (OPO) quasi-synchronously pumped by a fiber laser system with burst-mode operation. The pump source is a peak-power-selectable pulse-multiplied picosecond Yb fiber laser. The chirped pulses from a figure of eight-cavity mode-locked fiber laser seed are narrowed to a duration of less than 50 ps using an FBG reflector and a circulator. The narrowed pulses are directed to pass through a pulse multiplier and to form pulse bunches, each of which is composed of 13 sub-pulses. The obtained pulse bunches are amplified by two-stage fiber pre-amplifiers: one-stage is core-pumped and the other is cladding-pumped. A fiberized acousto-optic modulator is inserted to control the pulse repetition rate (PRR) of the pulse bunches before they are power-amplified in the final amplifier stage with a large mode area (LMA) PM Yb-doped fiber. The maximum average powers from the final amplifier are 85 W, 60 W, and 45 W, respectively, corresponding to the PRR of 2.72 MHz, 1.36 MHz, and 0.68 MHz. The amplified pulses are directed to pump an MgO:PPLN-based optical parametric oscillator (OPO). A maximum peak power at 3.45 μm is obtained approximately to be 8.4 kW. Detailed performance characteristics are presented.
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Received: 13 May 2014
Revised: 23 July 2014
Accepted manuscript online:
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PACS:
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42.65.Yj
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(Optical parametric oscillators and amplifiers)
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42.55.Wd
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(Fiber lasers)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61078015) and the National Basic Research Program of China (Grant No. 2011CB311803). |
Corresponding Authors:
Shen Yong-Hang
E-mail: physyh@zju.edu.cn
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Cite this article:
Wei Kai-Hua (魏凯华), Jiang Pei-Pei (姜培培), Wu Bo (吴波), Chen Tao (陈滔), Shen Yong-Hang (沈永行) Fiber laser pumped burst-mode operated picosecond mid-infrared laser 2015 Chin. Phys. B 24 024217
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