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Research Area

Author

  • Jared A. Kearns, Tatsushi Hamaguchi, Kentaro Hayashi, Maho Ohara, Tomohiro Makino, Maiko Ito, Noriko Kobayashi, Tatsurou Jyoukawa, Eiji Nakayama, Shoetsu Nagane, Koichi Sato, Yuki Nakamura, Yukio Hoshina, Rintaro Koda, Noriyuki Futagawa

Company

  • Sony Group Corporation

Venue

  • APEX

Date

  • 2022

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Longitudinal mode control in long cavity VCSELs with a curved mirror

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Abstract

A single cavity filtering mirror with a highly varying reflectivity spectrum was used to demonstrate a single longitudinal mode operation for a VCSEL with a ∼25 μm cavity length. The 443.5 nm lasing peak had an SMSR of 42 dB at 9 mA, 70 kA cm−2. Increasing the number of DBR pairs between the VCSEL and filtering mirror cavity reduced the simulated optical standing wave in the mirror cavity by 57% and experimentally gave a 42% increase in the slope efficiency to achieve 2.56 mW at 7 mA from a device with a 4 μm aperture with a single longitudinal mode.

Applied Physics Express

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