Single effective index method and scalar beam-propagation method analysis of bending loss for TE and TM polarized optical fields

Won Jay Song; Byung-Ha Ahn

doi:10.1117/12.451840

25 October 2002 Single effective index method and scalar beam-propagation method analysis of bending loss for TE and TM polarized optical fields

Won Jay Song, Byung-Ha Ahn

Author Affiliations +

Proceedings Volume 4772, Electro-Optical System Design, Simulation, Testing, and Training; (2002) https://doi.org/10.1117/12.451840
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

We have applied the single effective index method to reduce the two-dimensional refractive index profile into the one-dimensional refractive index structure and modified the wave equations to obtain the paraxial wave equations. Then, TE and TM polarized fields in the curved single-mode planar waveguides are analyzed by using the scalar beam-propagation method employing the finite-difference method with a slab structure. The bending loss in bent waveguides is analyzed for optical fields obtained from the beam-propagation method and comparisons are made between the loss for the waveguides with various radius of curvature and the refractive index difference. The outward shift of the optical field, which is generated at the connection between a straight and a bent waveguide, is obtained from the results of calculation of location of the maximum optical intensity. The transition loss can be reduced by introducing an optimized inward offset at a straight-to-bend junction.

Citation Download Citation

Won Jay Song and Byung-Ha Ahn "Single effective index method and scalar beam-propagation method analysis of bending loss for TE and TM polarized optical fields", Proc. SPIE 4772, Electro-Optical System Design, Simulation, Testing, and Training, (25 October 2002); https://doi.org/10.1117/12.451840

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