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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 18 — Jun. 20, 2007
  • pp: 3843–3849

Theoretical time-domain study of self-imaging properties in a multimode interference coupler

Hidenobu Hamada  »View Author Affiliations


Applied Optics, Vol. 46, Issue 18, pp. 3843-3849 (2007)
http://dx.doi.org/10.1364/AO.46.003843


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Abstract

We report a theoretical and numerical study of self-imaging properties, including time domain and pulse spreading, caused by modal group-delay dispersion in generalized N × N multimode interference devices achieved by using a mode-propagation analysis and finite-difference time-domain method. It was found that the spatial self-imaging condition does not realize temporal self-imaging but lets waveforms separate whose shape depends on input position and input field distribution. Pulse spreading, which is sensitive to beam diameter, has a very large variation ( 420   fs ) among input positions as well as rising to a very high 900   fs in response to a 21 fs and spatially Gaussian pulse for the conveniently smallest size with 10 channels.

© 2007 Optical Society of America

OCIS Codes
(230.7390) Optical devices : Waveguides, planar
(260.0260) Physical optics : Physical optics
(260.5950) Physical optics : Self-focusing

ToC Category:
Physical Optics

History
Original Manuscript: October 31, 2006
Revised Manuscript: February 9, 2007
Manuscript Accepted: March 12, 2007
Published: May 31, 2007

Citation
Hidenobu Hamada, "Theoretical time-domain study of self-imaging properties in a multimode interference coupler," Appl. Opt. 46, 3843-3849 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-18-3843


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