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Applied Optics

Applied 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)

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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

Original Manuscript: July 27, 1998
Revised Manuscript: January 22, 1999
Published: July 20, 1999

Hiroshi Komatsugawa, Masayasu Kamata, and Keisuke Sasaki, "Analysis of mode size transformation with a tapered directional coupler," Appl. Opt. 38, 4509-4515 (1999)

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