22 March 2016 Reciprocity principle and nonequivalence of counterpropagating modes in whistle-geometry ring lasers
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Abstract
Greatly enhanced high-speed modulation performance has been recently predicted in numerical calculations for a novel injection-locking scheme involving a distributed Bragg reflector master laser monolithically integrated with a unidirectional whistle-geometry semiconductor micro ring laser. In this work, we confirm the unidirectionality of the whistle-geometry configuration through rigorous three-dimensional finite-difference time-domain (FDTD) simulation by showing a strong asymmetry in photon lifetimes between the two counter propagating modes. At the same time, we explain why this result does not violate the Helmholtz reciprocity principle.
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Hemashilpa Kalagara, Hemashilpa Kalagara, Fei-Hung Chu, Fei-Hung Chu, Gennady A. Smolyakov, Gennady A. Smolyakov, Marek Osiński, Marek Osiński, } "Reciprocity principle and nonequivalence of counterpropagating modes in whistle-geometry ring lasers", Proc. SPIE 9742, Physics and Simulation of Optoelectronic Devices XXIV, 974213 (22 March 2016); doi: 10.1117/12.2214602; https://doi.org/10.1117/12.2214602
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