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Semiconductor Snail Lasers

Strain, Michael J.; Mezosi, Gabor; Sorel, Marc; Pérez-Serrano, Antonio; Scirè, Alessandro; Balle, Salvador; Verschaffelt, Guy; Danckaert, Jan;
Applied Physics Letters 96, 121105 (1-3) (2010)

A modified ring laser geometry is presented to promote stable unidirectional lasing. The effects of directional coupling and facet reflectivities are investigated with respect to quantum efficiency, directionality, and side-mode suppression ratio of the lasing spectra. Simulation and experimental results are presented showing single mode (>20 dB side-mode suppression ratio), unidirectional lasing on an InP based multiple quantum well material.