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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 29, Iss. 5 — Mar. 1, 2004
  • pp: 451–453

Irreversible coupling by use of dissipative optics

Maxim Greenberg and Meir Orenstein  »View Author Affiliations


Optics Letters, Vol. 29, Issue 5, pp. 451-453 (2004)
http://dx.doi.org/10.1364/OL.29.000451


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Abstract

The time reversibility of optical propagation impedes the definite performance of many optical devices, such as couplers, polarization converters, etc. We suggest a novel concept in which we use media with loss and gain, thus breaking the time-reversal characteristics, to achieve a unidirectional optical mode interference and coupling, which is a desirable feature for light-wave circuits. Using a matched periodic modulation of both the index of refraction and loss (gain) of the medium, we implement a spatially single sideband perturbation, which breaks the symmetry to allow only a unidirectional energy transfer from mode m to mode n of the optical structure. We elaborate on this phenomenon in coupling between two modes of a multimode optical waveguide.

© 2004 Optical Society of America

OCIS Codes
(230.0230) Optical devices : Optical devices
(230.3240) Optical devices : Isolators
(230.7370) Optical devices : Waveguides

Citation
Maxim Greenberg and Meir Orenstein, "Irreversible coupling by use of dissipative optics," Opt. Lett. 29, 451-453 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-5-451

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