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Adiabaticity criterion and the shortest adiabatic mode transformer in a coupled-waveguide system

Sun, Xiankai and Liu, Hsi-Chun and Yariv, Amnon (2009) Adiabaticity criterion and the shortest adiabatic mode transformer in a coupled-waveguide system. Optics Letters, 34 (3). pp. 280-282. ISSN 0146-9592.

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By analyzing the propagating behavior of the supermodes in a coupled-waveguide system, we have derived a universal criterion for designing adiabatic mode transformers. The criterion relates ε, the fraction of power scattered into the unwanted mode, to waveguide design parameters and gives the shortest possible length of an adiabatic mode transformer, which is approximately 2/πε^(1/2) times the distance of maximal power transfer between the waveguides. The results from numerical calculations based on a transfer-matrix formalism support this theory very well.

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Additional Information:© 2009 Optical Society of America. Received October 8, 2008; revised December 7, 2008; accepted December 8, 2008; posted December 12, 2008 (Doc. ID 102559); published January 26, 2009. This work was supported by Defense Advanced Research Projects Agency (DARPA) MTO office (J. Shah) under contract N66001-07-1-2058.
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Defense Advanced Research Projects Agency (DARPA)N66001-07-1-2058
Subject Keywords:spot-size transformer; integration; converters; conversion; tapers; lasers; OCIS Codes: (060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers; (130.2790) Integrated optics : Guided waves; (130.3120) Integrated optics : Integrated optics devices; (230.7370) Optical devices : Waveguides; ToC Category: Integrated Optics
Issue or Number:3
Record Number:CaltechAUTHORS:20090421-132055008
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14037
Deposited By: Tony Diaz
Deposited On:06 Aug 2009 21:26
Last Modified:03 Oct 2019 00:46

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