Volume 15 Issue 5
Sep.  2022
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Chinese Optics  > 2022  >  15(5): 895-911.
WANG Li-jie, TONG Cun-zhu, WANG Yan-jing, LU Huan-yu, ZHANG Xin, TIAN Si-cong, WANG Li-jun. Recent advances in lateral mode control technology of diode lasers[J]. Chinese Optics, 2022, 15(5): 895-911. doi: 10.37188/CO.2022-0143
Citation: WANG Li-jie, TONG Cun-zhu, WANG Yan-jing, LU Huan-yu, ZHANG Xin, TIAN Si-cong, WANG Li-jun. Recent advances in lateral mode control technology of diode lasers[J]. Chinese Optics, 2022, 15(5): 895-911. doi: 10.37188/CO.2022-0143
shu

Recent advances in lateral mode control technology of diode lasers

  • 1.

    State Key Laboratory of Luminescence and Application, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

  • 2.

    Jlight Semiconductor Technology Co., Ltd, Changchun 130031, China

Funds:  Supported by National Natural Science Foundation of China (No. 62025506, No. 62134008, No. 61790584); Youth Innovation Promotion Association, CAS (No. 2021217); Changchun City Science and Technology Development Plan (No. 21SH6)
More Information
  • Corresponding author: tongcz@ciomp.ac.cn
  • Received Date: 24 Jun 2022
  • Rev Recd Date: 19 Jul 2022
    • Available Online: 04 Aug 2022
    Abstract

  • High power diode lasers are widely used for pumping solid-state lasers and fiber lasers, material processing, laser radars, free-space optical communication, security and defense. However, conventional diode lasers suffer from large far-field divergence angles, poor beam quality and low brightness, which restricts their direct applications. Broad-Area diode Lasers (BALs) can achieve high output power and efficiency. However, their lateral mode is usually influenced by many physical mechanisms, leading to a large number of guided lateral modes at high-power operation. It results in a rapid increase of the far-field width and strongly deteriorated beam quality, limiting the improvement of diode lasers′ brightness. Therefore, the lateral modes should be carefully controlled. In this paper, the factors influencing the diode lasers′ lateral modes are reviewed, and the lateral mode characteristics, optical field distribution and their relations with the device construction are analyzed. Then, the current lateral mode control technologies are described in detail. The beam quality and brightness of the output beam can be enhanced via the suppression of high-order lateral modes and the far-field blooming effect. As a result of advanced lateral mode control, novel high-brightness diode lasers can be developed at the chip level, which is beneficial for developing new diode lasers applications and reducing their system cost.

     

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