title: Improved design of a polarization converter based on semiconductor optical waveguide bends.
abstract: By using an efficient vector finite-element-based beam-propagation method, we present an improved design of a polarization converter. This design relies on the use of a single-section deeply etched bent semiconductor waveguide with slanted sidewalls. By careful adjustment of the bend radius, the waveguide width, and the sidewall angle we obtained a nearly 100% polarization conversion ratio with no appreciable radiation loss and a bending angle of less than 180 degrees .
authors: S S
authors: SS
authors: Obayya
authors: B M
authors: BM
authors: Rahman
authors: K T
authors: KT
authors: Grattan
authors: H A
authors: HA
authors: El-Mikati