title: MoS2 nanoflowers as high performance saturable absorbers for an all-fiber passively Q-switched erbium-doped fiber laser.
abstract: Strong saturable absorption was observed in MoS2 nanoflowers, which were synthesized by a facile solvothermal method. A MoS2 nanoflower-based saturable absorber with a high modulation depth of 51.8% and a large saturable intensity of 275.5 GW cm(-2) was introduced to the application of passively Q-switched fiber laser generation. Stable passively Q-switched fiber laser pulses at 1.56 μm with a low threshold power of 16.10 mW, high signal-to-noise ratio of 52.5 dB and short pulse duration of 1.9 μs were obtained. More importantly, a high output power of 3.10 mW related to a large pulse energy of about 51.84 nJ can be attained at a very low pump power. The efficiency of the laser reaches 4.71%, which is larger than that of the prepared layered MoS2 and recently reported MoS2-based passively Q-switching operations. Such results imply that the MoS2 nanoflowers are an excellent candidate for a saturable absorber in passively Q-switched fiber lasers at a low pump intensity.
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, and Guangdong Provincial Key Laboratory of Fibers Laser Materials and Applied Techniques, South China University of Technology, Wushan Road 381, Guangzhou 510641, PR China. mshz@scut.edu.cn qjr@scut.edu.cn.
authors.forename: Rongfei
authors.initials: R
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, and Guangdong Provincial Key Laboratory of Fibers Laser Materials and Applied Techniques, South China University of Technology, Wushan Road 381, Guangzhou 510641, PR China. mshz@scut.edu.cn qjr@scut.edu.cn.
authors.forename: Hang
authors.initials: H
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, and Guangdong Provincial Key Laboratory of Fibers Laser Materials and Applied Techniques, South China University of Technology, Wushan Road 381, Guangzhou 510641, PR China. mshz@scut.edu.cn qjr@scut.edu.cn.
authors.forename: Xiangling
authors.initials: X
authors.lastname: Tian
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, and Guangdong Provincial Key Laboratory of Fibers Laser Materials and Applied Techniques, South China University of Technology, Wushan Road 381, Guangzhou 510641, PR China. mshz@scut.edu.cn qjr@scut.edu.cn.
authors.forename: Tian
authors.initials: T
authors.lastname: Qiao
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, and Guangdong Provincial Key Laboratory of Fibers Laser Materials and Applied Techniques, South China University of Technology, Wushan Road 381, Guangzhou 510641, PR China. mshz@scut.edu.cn qjr@scut.edu.cn.
authors.forename: Zhongliang
authors.initials: Z
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, and Guangdong Provincial Key Laboratory of Fibers Laser Materials and Applied Techniques, South China University of Technology, Wushan Road 381, Guangzhou 510641, PR China. mshz@scut.edu.cn qjr@scut.edu.cn.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Chen
authors.affiliation: School of Applied Physics and Materials, Wuyi University, Jiangmen 529020, PR China.
authors.forename: Xin
authors.initials: X
authors.lastname: He
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, and Guangdong Provincial Key Laboratory of Fibers Laser Materials and Applied Techniques, South China University of Technology, Wushan Road 381, Guangzhou 510641, PR China. mshz@scut.edu.cn qjr@scut.edu.cn.
authors.forename: Yongze
authors.initials: Y
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, and Guangdong Provincial Key Laboratory of Fibers Laser Materials and Applied Techniques, South China University of Technology, Wushan Road 381, Guangzhou 510641, PR China. mshz@scut.edu.cn qjr@scut.edu.cn.
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu