We report interband cascade lasers operating in a single spectral mode at . A corrugated pattern etched into both sidewalls of the 6- and -wide ridges serves to suppress higher-order lateral modes by increasing their loss, and also provides a fourth-order distributed-feedback grating for longitudinal mode selection. Despite the grating’s weak coupling strength, the ridge produced up to 12 mW per facet of single-mode cw output power at , with a side-mode suppression ratio of .
Corrugated-sidewall interband cascade lasers with single-mode midwave-infrared emission at room temperature
C. S. Kim, M. Kim, W. W. Bewley, J. R. Lindle, C. L. Canedy, J. Abell, I. Vurgaftman, J. R. Meyer; Corrugated-sidewall interband cascade lasers with single-mode midwave-infrared emission at room temperature. Appl. Phys. Lett. 7 December 2009; 95 (23): 231103. https://doi.org/10.1063/1.3272676
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