Radiation losses of tapered dielectric waveguides: a finite difference analysis with ridge waveguide applications

Author

Lu, Zhang-Ning ; Bansal, Rajeev ; Cheo, Peter K.

Author_Institution

Dept. of Electr. & Syst. Eng., Connecticut Univ., Storrs, CT, USA

Volume

12

Issue

8

fYear

1994

fDate

8/1/1994 12:00:00 AM

Firstpage

1373

Lastpage

1377

Abstract

The finite-difference third-order simplified wave equation method is used to study the radiation losses of optical waveguides with step (abrupt) and parabolic tapers, including the radiation losses of the tapered ridge waveguides used as electro-optic phase modulators for tuning the frequencies of infrared lasers. The radiation losses of the parabolic taper given by Burns et al. is found to be under 5%. The results of a step taper are compared with Marcuse´s; and found to be in good agreement. The numerical results are also compared with those from the coupled wave equations used by Sporloder and Unger

Keywords

electro-optical devices; finite difference methods; integrated optics; laser tuning; optical losses; optical modulation; optical waveguides; phase modulation; rectangular waveguides; coupled wave equations; electro-optic phase modulators; finite difference analysis; infrared laser frequency tuning; optical waveguides; parabolic tapers; radiation losses; ridge waveguide applications; step abrupt tapers; tapered dielectric waveguides; tapered ridge waveguides; third-order simplified wave equation method; tuning; Dielectric losses; Finite difference methods; Frequency; Laser tuning; Optical losses; Optical modulation; Optical tuning; Optical waveguides; Partial differential equations; Phase modulation;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.317524

Filename

317524