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Proceedings Paper

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

Paper Details

Date Published: 11 September 2017
PDF: 17 pages
Proc. SPIE 10345, Active Photonic Platforms IX, 1034520 (11 September 2017); doi: 10.1117/12.2274604
Show Author Affiliations
Marek Osiński, The Univ. of New Mexico (United States)
Hemashilpa Kalagara, The Univ. of New Mexico (United States)
Hosuk Lee, The Univ. of New Mexico (United States)
Gennady A. Smolyakov, The Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 10345:
Active Photonic Platforms IX
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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