Highly unidirectional Y-junction S-section ring lasers

Nathan J. Withers; Omar K. Qassim; Gennady A. Smolyakov; Marek Osiński

doi:10.1117/12.784186

29 February 2008 Highly unidirectional Y-junction S-section ring lasers

Nathan J. Withers, Omar K. Qassim, Gennady A. Smolyakov, Marek Osiński

Proceedings Volume 6889, Physics and Simulation of Optoelectronic Devices XVI; 688916 (2008) https://doi.org/10.1117/12.784186
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

Semiconductor ring lasers show great promise for rotation sensing through the Sagnac effect of frequency shifting. Ensuring a controlled unidirectional operation of ring lasers can greatly benefit this application. An S-section racetrack design for semiconductor ring lasers was previously developed with the goal of favoring the waves traveling in a preselected direction and suppressing the counterpropagating waves. However, that design turned out to be not as effective as expected, with bistable behavior and directional switching over a wide range of pumping currents. We report on design, fabrication and characterization of Y-junction S-section InAs/InGaAs/GaAs/AlGaAs quantum dot ring lasers with improved unidirectionality. The new design suppresses the unwanted counterpropagating waves more effectively than it was possible in the previous S-section-racetrack design.

Citation Download Citation

Nathan J. Withers, Omar K. Qassim, Gennady A. Smolyakov, and Marek Osiński "Highly unidirectional Y-junction S-section ring lasers", Proc. SPIE 6889, Physics and Simulation of Optoelectronic Devices XVI, 688916 (29 February 2008); https://doi.org/10.1117/12.784186

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