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  • Highly-efficient operation and mode control in GaN-based VCSELs with a curved mirror

Research Area

Author

  • Tatsushi Hamaguchi, Maiko Ito, Jared A. Kearns, Tomohiro Makino, Kentaro Hayashi, Maho Ohara, Noriko Kobayashi, Tatsuro Jyokawa, Eiji Nakayama, Shouetsu Nagane, Koichi Sato, Yuki Nakamura, Yukio Hoshina, Yuichiro Kikuchi, Takumi Watanabe, Yuya Kanitani, Seiji Kasahara, Yoshihiro Kudo, Susumu Kusanagi, Rintaro Koda, Noriyuki Fuutagawa

Company

  • Sony Group Corporation

Venue

  • SPIE Photonics West

Date

  • 2023

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Highly-efficient operation and mode control in GaN-based VCSELs with a curved mirror

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Abstract

We report the latest progress of gallium nitride-based Vertical-Cavity Surface-Emitting Lasers (VCSELs) containing a curved mirror. Highly uniform and efficient devices were developed. The average threshold current was 0.64 mA with a standard deviation of 0.043 mA. The peak wall-plug efficiency and output power were 13.4 % and 7.6 mW at operating currents of 5.2 mA and 12.8 mA, respectively. We obtained green VCSELs with milliwatt-class outputs and a wall-plug efficiency of 3.7%. We also report the progress of VCSELs with a single-cavity filtering mirror and a cavity length of approximately 25 μm showing highly varying reflectivity spectra, to demonstrate their single-longitudinal mode operation.

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