Broadband Planar Waveguide Power Splitter Based on Symmetrical S-bends

Abstract

In this paper, $1 \times 8\ s-\text{bend}-\text{arc}$ based symmetrical and wavelength insensitive optical beam splitter is modeled using beam propagation method (BPM). Silicon-on-insulator (SOI) material platform is utilized for realizing rib structure based single-mode linear and $s$-bend curve waveguides. The performance of splitter is characterized in terms of insertion loss and non-uniformity (insertion loss uniformity). The proposed device provides spectral flatness over 100 nm wavelength span ranging from 1500 nm to 1600 nm. Also, 95.3 % of relative power is observed at the output waveguide port of the device.