title: Multi-layered black phosphorus as saturable absorber for pulsed Cr:ZnSe laser at 2.4 μm.
abstract: 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.
authors.forename: Zhaowei
authors.initials: Z
authors.lastname: Wang
authors.forename: Ruwei
authors.initials: R
authors.lastname: Zhao
authors.forename: Jingliang
authors.initials: J
authors.lastname: He
authors.forename: Baitao
authors.initials: B
authors.lastname: Zhang
authors.forename: Jian
authors.initials: J
authors.lastname: Ning
authors.forename: Yiran
authors.initials: Y
authors.lastname: Wang
authors.forename: Xiancui
authors.initials: X
authors.lastname: Su
authors.forename: Jia
authors.initials: J
authors.lastname: Hou
authors.forename: Fei
authors.initials: F
authors.lastname: Lou
authors.forename: Kejian
authors.initials: K
authors.lastname: Yang
authors.forename: Yisong
authors.initials: Y
authors.lastname: Fan
authors.forename: Jintian
authors.initials: J
authors.lastname: Bian
authors.forename: Jinsong
authors.initials: J
authors.lastname: Nie