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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 21 — Jul. 20, 1999
  • pp: 4509–4515

Analysis of Mode Size Transformation with a Tapered Directional Coupler

Hiroshi Komatsugawa, Masayasu Kamata, and Keisuke Sasaki  »View Author Affiliations


Applied Optics, Vol. 38, Issue 21, pp. 4509-4515 (1999)
http://dx.doi.org/10.1364/AO.38.004509


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Abstract

A simple tapered directional coupler with a five-layered structure is employed for mode conversion between a single-order and higher-order modes. We investigate coupling from higher-order modes to a single-order field theoretically and experimentally. As a result, we confirm that the first two modes in the tapered waveguide are coupled with a single-order mode in another waveguide by computer simulation using the beam propagation method. Furthermore, we fabricated the actual device and observed the streak patterns of the first three modes.

© 1999 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(230.7400) Optical devices : Waveguides, slab
(310.2790) Thin films : Guided waves

Citation
Hiroshi Komatsugawa, Masayasu Kamata, and Keisuke Sasaki, "Analysis of Mode Size Transformation with a Tapered Directional Coupler," Appl. Opt. 38, 4509-4515 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-21-4509


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