Published May 1, 1999
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Supermodes of grating-coupled multimode waveguides and application to mode conversion between copropagating modes mediated by backward Bragg scattering
- Creators
- Peral, Eva
- Yariv, Amnon
Abstract
An analysis of multimode waveguides where several modes are coupled via quasiperiodic perturbations is presented. The supermodes (or eigenmodes) of the structure are derived and orthonormality considerations are discussed. In addition, a new type of mode converter between copropagating modes is proposed, where mode conversion is mediated by a backward propagating mode. Adiabatic and nonadiabatic coupling coefficients are considered and the supermode formalism is used to conveniently describe the mode of operation of the device.
Additional Information
© Copyright 1999 IEEE. Reprinted with permission. Manuscript received August 14, 1998; revised February 5, 1999. This work was supported by the Defense Advanced Research Projects Agency the Office of Naval Research and the Air Force Office of Scientific Research under Award N00014-91-J-1195. The authors wish to thank O. Painter for useful discussions on non-Hermitian systems and to A. Bäcker for his encouragement during the realization of this work.Files
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- Eprint ID
- 5188
- Resolver ID
- CaltechAUTHORS:PERjlt99
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2006-10-04Created from EPrint's datestamp field
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