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  • Received: Jun. 15, 2020

    Accepted: Jul. 23, 2020

    Posted: Sep. 17, 2020

    Published Online: Sep. 21, 2020

    The Author Email: Jinlong Xu (longno.2@163.com), Zhenda Xie (xiezhenda@nju.edu.cn)

    DOI: 10.3788/COL202018.111901

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    Tianqi Zhang, Mudong Wang, Yang Xue, Jinlong Xu, Zhenda Xie, Shining Zhu. Liquid metal as a broadband saturable absorber for passively Q-switched lasers[J]. Chinese Optics Letters, 2020, 18(11): 111901

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Chinese Optics Letters, Vol. 18, Issue 11, 111901 (2020)

Liquid metal as a broadband saturable absorber for passively Q-switched lasers 

Tianqi Zhang1,2, Mudong Wang1,2, Yang Xue1,2, Jinlong Xu3,*, Zhenda Xie3,**, and Shining Zhu2

Author Affiliations

  • 1National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
  • 2School of Physics, Nanjing University, Nanjing 210093, China
  • 3School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China

Abstract

We demonstrated the efficient plasmon-induced nonlinear absorption of liquid metal GaInSn nanospheres prepared by a facile liquid-phase method. With GaInSn as saturable absorbers, a passively Q-switching operation was obtained at both 1.3 and 2 μm. The pulse width of 32 ns was achieved at 1.3 μm with repetition rate of 44 kHz, single pulse energy of 51.9 μJ, and output power of 425 mW. Meanwhile, 510 ns and 92 kHz pulses with energy of 36.1 μJ and output power of 2.48 W were obtained at 2 μm. This work provides the potential of liquid metal for improving metal functions and flexible optical devices.

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