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Chinese Optics Letters, Volume. 20, Issue 1, 011404(2022)

Mode-locked fiber laser of 3.5 µm using a single-walled carbon nanotube saturable absorber mirror

Jincheng Wei1, Peng Li1, Linpeng Yu1, Shuangchen Ruan1,2, Keyi Li1, Peiguang Yan1, Jiachen Wang1, Jinzhang Wang1, Chunyu Guo1、*, Wenjun Liu3, Ping Hua4, and Qitao Lü5
Author Affiliations
  • 1Shenzhen Key Laboratory of Laser Engineering, Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
  • 2College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
  • 3State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 4Faculty of Engineering and Physical Sciences, University of Southampton, Southampton SO 17 1BJ, UK
  • 5Han’s Laser Technology Industry Group Co., Ltd., Shenzhen 518057, China
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    (a) Prepared SWCNT-SAM. Inset: dispersion of SWCNT. (b) TEM image of SWCNT in coarse resolution. (c) TEM images of SWCNT in fine resolution. (d) Raman spectrum of SWCNT-SAM.

    Fig. 1. (a) Prepared SWCNT-SAM. Inset: dispersion of SWCNT. (b) TEM image of SWCNT in coarse resolution. (c) TEM images of SWCNT in fine resolution. (d) Raman spectrum of SWCNT-SAM.

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    (a) Linear and (b) nonlinear reflection characteristics of SWCNT-SAM. (c) Schematic of the setup for characterizing saturable absorption.

    Fig. 2. (a) Linear and (b) nonlinear reflection characteristics of SWCNT-SAM. (c) Schematic of the setup for characterizing saturable absorption.

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    Experimental setup of the 3.5 µm mode-locked fiber laser and the diagram showing the transition processes involved in the generation of the 3.5 µm radiation.

    Fig. 3. Experimental setup of the 3.5 µm mode-locked fiber laser and the diagram showing the transition processes involved in the generation of the 3.5 µm radiation.

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    Characteristics of the 3.5 µm mode-locked pulses: (a) optical spectrum, inset: optical spectrum in linear format; (b) pulse train; (c) RF spectrum around the fundamental frequency, inset: RF spectrum in a 500 MHz span. (d) Damaged surface of SWCNT-SAM, inset: pulse train of the Q-switched pulses.

    Fig. 4. Characteristics of the 3.5 µm mode-locked pulses: (a) optical spectrum, inset: optical spectrum in linear format; (b) pulse train; (c) RF spectrum around the fundamental frequency, inset: RF spectrum in a 500 MHz span. (d) Damaged surface of SWCNT-SAM, inset: pulse train of the Q-switched pulses.

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    Jincheng Wei, Peng Li, Linpeng Yu, Shuangchen Ruan, Keyi Li, Peiguang Yan, Jiachen Wang, Jinzhang Wang, Chunyu Guo, Wenjun Liu, Ping Hua, Qitao Lü, "Mode-locked fiber laser of 3.5 µm using a single-walled carbon nanotube saturable absorber mirror," Chin. Opt. Lett. 20, 011404 (2022)

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    Paper Information

    Category: Lasers, Optical Amplifiers, and Laser Optics

    Received: Sep. 6, 2021

    Accepted: Oct. 14, 2021

    Published Online: Nov. 12, 2021

    The Author Email: Chunyu Guo (cyguo@szu.edu.cn)

    DOI:10.3788/COL202220.011404

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology