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arXiv · 1508.02850

Black phosphorus as saturable absorber for the Q-switched Er:ZBLAN fiber laser at 2.8 {\mu}m

Zhipeng Qin·Guoqiang Xie·Han Zhang·Chujun Zhao·Peng Yuan·Shuangchun Wen·Liejia Qian
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Abstract

Black phosphorus, a newly emerged two-dimensional material, has attracted wide attention as novel photonic material. Here, multi-layer black phosphorus is successfully fabricated by liquid phase exfoliation method. By employing black phosphorus as saturable absorber, we demonstrate a passively Q-switched Er-doped ZBLAN fiber laser at the wavelength of 2.8 {\mu}m. The modulation depth and saturation fluence of the black phosphorus saturable absorber are measured to be 15% and 9 {\mu}J/cm2, respectively. The Q-switched fiber laser delivers a maximum average power of 485 mW with corresponding pulse energy of 7.7 {\mu}J and pulse width of 1.18 {\mu}s at repetition rate of 63 kHz. To the best of our knowledge, this is the first time to demonstrate that black phosphorus can realize Q-switching of 2.8-{\mu}m fiber laser. Our research results show that black phosphorus is a promising saturable absorber for mid-infrared pulsed lasers.

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Zhipeng Qin, Guoqiang Xie, Han Zhang, Chujun Zhao, Peng Yuan, Shuangchun Wen, Liejia Qian. 2015-08-12. Black phosphorus as saturable absorber for the Q-switched Er:ZBLAN fiber laser at 2.8 {\mu}m. https://doi.org/10.1364/oe.23.024713

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