Laser & Optoelectronics Progress, Volume. 62, Issue 15, 1514006(2025)

976 nm External Cavity Diode Laser with High Beam Quality and Narrow Linewidth

Qinghao Zhao1,5, Di Xin4,5, Kai Gong4,5, Hai Wang2,3, Xuyan Zhou2, and Hongbo Zhang3、*
Author Affiliations
  • 1College of Information Science and Engineering, Shandong University, Qingdao 266237, Shandong , China
  • 2Laboratory of Solid-State Optoelectronics Information Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 3School of Optoelectronics, University of Chinese Academy of Sciences, Beijing 100049, China
  • 4College of Physics and Physical Engineering, Qufu Normal University, Jining 273165, Shandong , China
  • 5Weifang Academy of Advanced Opto-Electronic Circuits, Weifang 261021, Shandong , China
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    Figures & Tables(8)
    Structural model of external cavity diode laser
    Schematic of mode selection principle for external cavity diode laser. (a) Gain curve and loss curve; (b) internal cavity modes; (c) external cavity modes; (d) gain saturation competition and mode competition; (e) single-peak mode output
    Schematic of tapered laser diode
    Simulation results of external cavity coupling oscillation mode
    High beam quality and narrow linewidth external cavity diode laser. (a) Schematic diagram; (b) physical device
    Experimental results. (a) Free-running operation output power curve; (b) free spectrum; (c) initial beam quality (inset: morphology of the light spot recorded by CCD)
    976 nm 3 dB linewidth after mode selection and locking with an external cavity structure
    Fast- and slow-axis beam quality of the locked 976 nm output
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    Qinghao Zhao, Di Xin, Kai Gong, Hai Wang, Xuyan Zhou, Hongbo Zhang. 976 nm External Cavity Diode Laser with High Beam Quality and Narrow Linewidth[J]. Laser & Optoelectronics Progress, 2025, 62(15): 1514006

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    Paper Information

    Category: Lasers and Laser Optics

    Received: Dec. 17, 2024

    Accepted: Jan. 20, 2025

    Published Online: Aug. 4, 2025

    The Author Email: Hongbo Zhang (hbzhang@ucas.ac.cn)

    DOI:10.3788/LOP242432

    CSTR:32186.14.LOP242432

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