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Optics Letters

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  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 10 — May. 15, 2007
  • pp: 1311–1313

Extraneous self-imaging phenomenon with weak-guiding condition

Jong-Kyun Hong, Sang-Sun Lee, and Seung-Dae Lee  »View Author Affiliations


Optics Letters, Vol. 32, Issue 10, pp. 1311-1313 (2007)
http://dx.doi.org/10.1364/OL.32.001311


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Abstract

We discuss a self-imaging phenomenon in a multimode interference (MMI) coupler. From experiment, different self-images, which are undefined in MMI theory, are observed. These undefined self-images are named “extraneous self-images” (Ex̱SIs) for convenience. To estimate the applicability of the Ex̱SIs, the characteristics of both the single self-image ( 0 dB self-image, 0 dB SI), which is defined in MMI theory, and the Ex̱SI are compared and analyzed through simulation and experiment. The results show that the Ex̱SI has an imaging period that is the same as the 0 dB SI and that the excess loss and the extinction ratio of the Ex̱SI improve more than that of the 0 dB SI as the imaging period increases.

© 2007 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(260.3160) Physical optics : Interference

ToC Category:
Physical Optics

History
Original Manuscript: November 10, 2006
Revised Manuscript: February 7, 2007
Manuscript Accepted: February 21, 2007
Published: April 17, 2007

Citation
Jong-Kyun Hong, Sang-Sun Lee, and Seung-Dae Lee, "Extraneous self-imaging phenomenon with weak-guiding condition," Opt. Lett. 32, 1311-1313 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-10-1311


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