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Versatile soliton emission from a WS2 mode-locked fiber laser

guobo94656329 添加于 2017/12/3 18:17:21  28次阅读 | 0次推荐 | 0个评论

Recently, few-layer tungsten disulfide (WS2), as a shining 2D material, has been discovered to possess both the saturable absorption ability and large nonlinear refractive index. Here, we demonstrate versatile soliton pulses in a passively mode-locked fiber laser with a WS2-deposited microfiber. The few-layer WS2 is prepared by the liquid-phase exfoliation method and transferred onto a microfiber by the optical deposition method. Study found, the WS2-deposited microfiber can operate simultaneously as a mode-locker and a high-nonlinear device. In experiment, by further inserting the WS2 device into the fiber laser, besides the dual-wavelength soliton, noise-like soliton pulse, conventional soliton and its harmonic form are obtained by properly adjusting the pump strength and the polarization states. For the dual-wavelength soliton pulses and noise-like pulse, the maximum output power of 14.2 mW and pulse energy of 4.74 nJ is obtained, respectively. In addition, we also achieve the maximum harmonic number (135) of conventional soliton, corresponding to a repetition rate of ~497.5 MHz. Our study shows clearly that WS2-deposited microfiber can be as a high-nonlinear photonic device for studying a plenty of nonlinear soliton phenomena.

作 者:B. Guo, S. Li, Y. Fan and P. Wang
期刊名称: Opt. Commun., Special issue: Optoelectronics and Photonics Based on 2D Materials
期卷页: Jan.1, 2018 第406卷 第期 66-71页
学科领域:信息科学 » 光学和光电子学 » 光子与光电子器件
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关键词: Mode-locked fiber laser; Soliton; Saturable absorber; Two-dimensional materials; WS2
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