Infrared and Laser Engineering, Volume. 49, Issue 4, 0405003(2020)
142 W high peak power narrow-linewidth linearly polarized pulsed fiber laser
An all fiber linearly polarized narrow-linewidth nanosecond pulsed fiber laser based on master oscillator power amplifier (MOPA) structure was reported. The pulsed seed was generated by modulating a single-frequency distributed feedback (DFB) fiber laser using an electro-optic intensity modulator. In order to suppress stimulated Brillouin scattering (SBS), the pulse width was set to be 3 ns and the linewidth of seed was broadened to be 2.9 GHz by a phase modulator. After amplifying by two stages polarization maintaining Yb3+ doped fiber amplifier chain, the output pulse laser was obtained with an average power of 142 W, a repetition rate of 1 MHz, a pulse duration of 2.88 ns, corresponding to peak power of 49.3 kW. At maximum output power, the laser beam quality M2 was ~ 1.15 and the polarization extinction ratio(PER) was >15.4 dB.
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Kun Zhang, Shouhuan Zhou, Yao Li, Liming Zhang, Yang Yu, Haobin Zhang, Chen Zhu, Dayong Zhang, Hong Zhao. 142 W high peak power narrow-linewidth linearly polarized pulsed fiber laser[J]. Infrared and Laser Engineering, 2020, 49(4): 0405003
Received: Dec. 7, 2019
Accepted: --
Published Online: May. 27, 2020
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