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1 April 2020 Spatiotemporal stabilization of PT-symmetric BAS lasers
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We propose a compact solution to spatially regularize and temporally stabilize edge emitting (broad area) semiconductor lasers. The scheme relays on the local asymmetries generated by a non-Hermitian potential with a central symmetry axis to manage the flow of light, which stabilizes the radiation while enhancing and localizing the generated laser beam. We introduce a harmonic modulation on the pump with a central symmetry axis, and a complex refractive index modulation that generates a local PT-symmetry within the laser. The local PT-symmetry creates an inward mode coupling that concentrates the light generated in the active layer on axis. We perform a comprehensive analysis of all the modulation parameters and find regimes of simultaneous temporal stability and light concentration. The present approach produces two in one: light localization into a narrow beam emission and the control over the spatiotemporal dynamics, improving the laser performance.
Conference Presentation
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. Medina Pardell, R. Herrero , M. Botey , and K. Staliunas "Spatiotemporal stabilization of PT-symmetric BAS lasers", Proc. SPIE 11356, Semiconductor Lasers and Laser Dynamics IX, 1135610 (1 April 2020);

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