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Chinese Optics Letters, Volume. 22, Issue 12, 121403(2024)

High-brightness and high-efficiency diode laser module based on a coherent–spectral beam combining external cavity

Lingqian Meng1,2, Weiqiao Zhang3, Jing Liu1,3,4, Peng Cao1,2, Yufei Wang1,3,4, Xuyan Zhou3, and Wanhua Zheng1,2,4,5、*
Author Affiliations
  • 1Laboratory of Solid State Optoelectronics Information Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Weifang Academy of Advanced Opto-Electronic Circuits, Weifang 261071, China
  • 4State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 5College of Future Technology, University of Chinese Academy of Sciences, Beijing 101408, China
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    Schematic diagrams of (a) the CSBC, (b) the CBC, and (c) the SBC. LD, laser diode; AL, aspherical collimating lens; M, plane mirror; BS, beam splitter; TL, transmission lens; G, transmission grating; OC, output coupler.

    Fig. 1. Schematic diagrams of (a) the CSBC, (b) the CBC, and (c) the SBC. LD, laser diode; AL, aspherical collimating lens; M, plane mirror; BS, beam splitter; TL, transmission lens; G, transmission grating; OC, output coupler.

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    (a) Beam combining direction profile, (b) non-CBC direction profile, and (c) free-running profile.

    Fig. 2. (a) Beam combining direction profile, (b) non-CBC direction profile, and (c) free-running profile.

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    The purple curve in the graph represents the change in the beam combining efficiency with the current. The red curve represents the change in the output power of the CSBC structure with the current, and the black curve represents the change in the output power of a single LD with the current.

    Fig. 3. The purple curve in the graph represents the change in the beam combining efficiency with the current. The red curve represents the change in the output power of the CSBC structure with the current, and the black curve represents the change in the output power of a single LD with the current.

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    (a) Measured results for the beam quality of a single laser emitter at 0.55 A. (b) Measured results for the beam quality of the CSBC structure at 0.55 A.

    Fig. 4. (a) Measured results for the beam quality of a single laser emitter at 0.55 A. (b) Measured results for the beam quality of the CSBC structure at 0.55 A.

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    Emission spectrum of the CSBC structure at an injection current of 0.55 A.

    Fig. 5. Emission spectrum of the CSBC structure at an injection current of 0.55 A.

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    Lingqian Meng, Weiqiao Zhang, Jing Liu, Peng Cao, Yufei Wang, Xuyan Zhou, Wanhua Zheng, "High-brightness and high-efficiency diode laser module based on a coherent–spectral beam combining external cavity," Chin. Opt. Lett. 22, 121403 (2024)

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    Paper Information

    Category: Lasers, Optical Amplifiers, and Laser Optics

    Received: May. 22, 2024

    Accepted: Jun. 24, 2024

    Published Online: Jan. 2, 2025

    The Author Email: Wanhua Zheng (whzheng@semi.ac.cn)

    DOI:10.3788/COL202422.121403

    CSTR:32184.14.COL202422.121403

    Topics

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