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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 34, Iss. 27 — Sep. 20, 1995
  • pp: 6168–6171

Accurate coupling coefficients for fiber couplers with weakly fused cross sections

Hung-chun Chang, Ting-Huei Lin, and Tzong-Lin Wu  »View Author Affiliations


Applied Optics, Vol. 34, Issue 27, pp. 6168-6171 (1995)
http://dx.doi.org/10.1364/AO.34.006168


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Abstract

For fused tapered fiber couplers with weakly fused cross sections, power coupling takes place between two touching tapered cladding cylinders embedded in the air, and the cylinders then become a strongly guiding structure. We provide accurate polarization-dependent coupling coefficients for such a structure, on the basis of a rigorous vectorial numerical calculation. Our results for the corresponding weakly guiding structure are compared with previous vector perturbation methods base on scalar fields. It is found that the scalar theories are not applicable to those cases with large normalized frequencies or with small fiber separations when the polarization-splitting effect is concerned.

© 1995 Optical Society of America

History
Original Manuscript: August 2, 1994
Revised Manuscript: April 7, 1995
Published: September 20, 1995

Citation
Hung-chun Chang, Ting-Huei Lin, and Tzong-Lin Wu, "Accurate coupling coefficients for fiber couplers with weakly fused cross sections," Appl. Opt. 34, 6168-6171 (1995)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-34-27-6168

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