Polarization Dependence of Pure Bending Loss in Slab Optical Waveguides

Junji YAMAUCHI  Osamu SAITO  Minoru SEKIGUCHI  Hisamatsu NAKANO  

IEICE TRANSACTIONS on Electronics   Vol.E79-C   No.6   pp.870-873
Publication Date: 1996/06/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Electromagnetic Theory
beam-propagation method,  bent waveguides,  polarization,  

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The finite-difference beam-propagation method is applied to the analysis of a bent step-index slab optical waveguide. The results obtained in the rectangular coordinates with a modified index profile are compared with those in the cylindrical coordinates with a real index profile. It is found that the attenuation constant for TMo mode is larger than that for TEo mode. The polarization dependence of bending loss is negligible, provided the refractive index difference is less than 2%.