Structure-induced asymmetry between counterpropagating modes and the reciprocity principle in whistle-geometry ring lasers

Marek Osiński; Hemashilpa Kalagara; Hosuk Lee; Gennady A. Smolyakov

doi:10.1117/12.2274604

11 September 2017 Structure-induced asymmetry between counterpropagating modes and the reciprocity principle in whistle-geometry ring lasers

Marek Osiński, Hemashilpa Kalagara, Hosuk Lee, Gennady A. Smolyakov

Author Affiliations +

Proceedings Volume 10345, Active Photonic Platforms IX; 1034520 (2017) https://doi.org/10.1117/12.2274604
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States

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 microring laser. Operation of these devices relies on the assumption of large difference between modal losses experienced by counterpropagating modes. In this work, we confirm the unidirectionality of the whistle-geometry configuration through rigorous three-dimensional finite-difference timedomain (FDTD) simulation by showing a strong asymmetry in photon lifetimes between the two counterpropagating modes. We also show that similar asymmetry occurs in three-port couplers, whose structure resembles the coupling section of whistle-geometry lasers. We explain why these results do not violate the Helmholtz reciprocity principle.

Citation Download Citation

Marek Osiński, Hemashilpa Kalagara, Hosuk Lee, and Gennady A. Smolyakov "Structure-induced asymmetry between counterpropagating modes and the reciprocity principle in whistle-geometry ring lasers", Proc. SPIE 10345, Active Photonic Platforms IX, 1034520 (11 September 2017); https://doi.org/10.1117/12.2274604

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