Lateral-longitudinal near field measurements of 10 micrometer broad ridge blue laser diodes

Dominic J. Kunzmann; Lukas Uhlig; Jannina J. Tepaß; Anna Kafar; Szymon Stanczyk; Piotr Perlin; Ulrich T. Schwarz

doi:10.1117/12.2608109

5 March 2022 Lateral-longitudinal near field measurements of 10 micrometer broad ridge blue laser diodes

Dominic J. Kunzmann, Lukas Uhlig, Jannina J. Tepaß, Anna Kafar, Szymon Stanczyk, Piotr Perlin, Ulrich T. Schwarz

Proceedings Volume 12001, Gallium Nitride Materials and Devices XVII; 120010A (2022) https://doi.org/10.1117/12.2608109
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

We investigate the lateral near field of blue laser diodes with 10 μm broad ridges in pulsed conditions. While scanning the near field step by step with the help of a streak camera, we observe complex dynamics due to lateral-longitudinal mode competition, wavelength shifts and lateral mode switching. Additionally, a high-resolution spectrometer enables us to differentiate between the different mode combs which form the longitudinal mode spectrum. We observe filling of the gain volume and a spectral broadening with increasing current, as well as a slight asymmetry and an inhomogeneous lateral mode pattern.

Conference Presentation

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Dominic J. Kunzmann, Lukas Uhlig, Jannina J. Tepaß, Anna Kafar, Szymon Stanczyk, Piotr Perlin, and Ulrich T. Schwarz "Lateral-longitudinal near field measurements of 10 micrometer broad ridge blue laser diodes", Proc. SPIE 12001, Gallium Nitride Materials and Devices XVII, 120010A (5 March 2022); https://doi.org/10.1117/12.2608109

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