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°.
© 2001 Optical Society of America
Original Manuscript: January 8, 2001
Revised Manuscript: May 8, 2001
Published: October 20, 2001
Salah S. A. Obayya, B. M. Azizur Rahman, Kennith T. V. Grattan, and Hamdi A. El-Mikati, "Improved design of a polarization converter based on semiconductor optical waveguide bends," Appl. Opt. 40, 5395-5401 (2001)