1-1hit |
Junji YAMAUCHI Osamu SAITO Minoru SEKIGUCHI Hisamatsu NAKANO
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%.