Interband Cascade Lasers with Sidewall Corrugations for Enhanced Brightness

M. Kim; C.S. Kim; C. L. Canedy; W. W. Bewley; C. D. Merritt; I. Vurgaftman; J. R. Meyer

doi:10.1117/12.2508703

8 March 2019 Interband Cascade Lasers with Sidewall Corrugations for Enhanced Brightness

M. Kim, C.S. Kim, C. L. Canedy, W. W. Bewley, C. D. Merritt, I. Vurgaftman, J. R. Meyer

Proceedings Volume 10939, Novel In-Plane Semiconductor Lasers XVIII; 109390X (2019) https://doi.org/10.1117/12.2508703
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

We have experimentally investigated the effects of sidewall corrugations on the beam quality and brightness of narrow-ridge interband cascade lasers (ICLs) emitting at λ ≈ 3.3 μm. We find that at this wavelength a corrugation period of 10 µm provides greater suppression of higher-order lateral modes than a shorter period of 2-4 µm. While the power and efficiency decrease modestly for the longer corrugation period, there is a net increase of the brightness defined as the output power divided by the beam quality factor M2 . However, the brightness degrades when the corrugation amplitude is increased from 2 µm to 3.5 µm, since lower output power offsets a relatively small improvement of the beam quality

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M. Kim, C.S. Kim, C. L. Canedy, W. W. Bewley, C. D. Merritt, I. Vurgaftman, and J. R. Meyer "Interband Cascade Lasers with Sidewall Corrugations for Enhanced Brightness", Proc. SPIE 10939, Novel In-Plane Semiconductor Lasers XVIII, 109390X (8 March 2019); https://doi.org/10.1117/12.2508703

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