Multi-layered black phosphorus as saturable absorber for pulsed Cr:ZnSe laser at 2.4 μm

A high-quality black phosphorus (BP) saturable-absorber mirror (SAM) was successfully fabricated with the multi-layered BP, prepared by liquid-phase exfoliation (LPE) method. The modulation depth and saturation power intensity of BP absorber were measured to be 10.7% and 0.96 MW/cm(2), respectively....

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Bibliographic Details
Published in:Optics express 2016-01, Vol.24 (2), p.1598-1603
Main Authors: Wang, Zhaowei, Zhao, Ruwei, He, Jingliang, Zhang, Baitao, Ning, Jian, Wang, Yiran, Su, Xiancui, Hou, Jia, Lou, Fei, Yang, Kejian, Fan, Yisong, Bian, Jintian, Nie, Jinsong
Format: Article
Language:English
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Summary:A high-quality black phosphorus (BP) saturable-absorber mirror (SAM) was successfully fabricated with the multi-layered BP, prepared by liquid-phase exfoliation (LPE) method. The modulation depth and saturation power intensity of BP absorber were measured to be 10.7% and 0.96 MW/cm(2), respectively. Using the BP-SAM, we experimentally demonstrated the mid-infrared (mid-IR) pulse generation from a BP Q-switched Cr:ZnSe laser for the first time to our best knowledge. Stable Q-switched pulse as short as 189 ns with an average output power of 36 mW was realized at 2.4 μm, corresponding to a repetition rate of 176 kHz and a single pulse energy of 205 nJ. Our work sufficiently validated that multi-layer BP could be used as an optical modulator for mid-IR pulse laser sources.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.24.001598