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Antireflective vertical-cavity surface-emitting laser for LiDAR

Author

Listed:
  • Cheng Zhang

    (Vertilite Co. Ltd., Wujin District)

  • Huijie Li

    (Vertilite Co. Ltd., Wujin District)

  • Dong Liang

    (Vertilite Co. Ltd., Wujin District)

Abstract

Multijunction vertical-cavity surface-emitting lasers (VCSELs) have gained popularity in automotive LiDARs, yet achieving a divergence of less than 16° (D86) is difficult for conventional extended cavity designs due to multiple-longitudinal-mode lasing. Our innovation, the antireflective vertical-cavity surface-emitting laser (AR-VCSEL), addresses this challenge by introducing an antireflective light reservoir, where the electric field intensity is substantially higher than the gain region. This reduces the required cavity length for minimal divergence, preserving the single-longitudinal-mode lasing. A 6-junction AR-VCSEL array showcases a halved divergence and tripled brightness compared to its conventional counterpart. Various multijunction AR-VCSEL array designs achieve a divergence range of 8° to 16° (D86). Notably, a 7 μm AR-VCSEL emitter achieves 28.4 mW in single transverse mode lasing. AR-VCSEL stands out among semiconductor lasers, offering a well-balanced power density and brightness, making it a cost-effective solution for long-distance LiDARs. The antireflective cavity concept may inspire diverse applications in photonic devices beyond LiDARs.

Suggested Citation

  • Cheng Zhang & Huijie Li & Dong Liang, 2024. "Antireflective vertical-cavity surface-emitting laser for LiDAR," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-44754-w
    DOI: 10.1038/s41467-024-44754-w
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    References listed on IDEAS

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    1. Takuya Inoue & Masahiro Yoshida & John Gelleta & Koki Izumi & Keisuke Yoshida & Kenji Ishizaki & Menaka Zoysa & Susumu Noda, 2022. "General recipe to realize photonic-crystal surface-emitting lasers with 100-W-to-1-kW single-mode operation," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    2. Masahiro Yoshida & Shumpei Katsuno & Takuya Inoue & John Gelleta & Koki Izumi & Menaka De Zoysa & Kenji Ishizaki & Susumu Noda, 2023. "High-brightness scalable continuous-wave single-mode photonic-crystal laser," Nature, Nature, vol. 618(7966), pages 727-732, June.
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