Silica-based circular cross-sectioned channel waveguides

Author

Sun, C.J. ; Myers, W.M. ; Schmidt, K.M. ; Sumida, S.

Author_Institution

Photonic Integration Res. Inc., Columbus, OH, USA

Volume

3

Issue

3

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

238

Lastpage

240

Abstract

A technique for fabricating silica channel waveguides with circular cross sections is presented. The geometrical mismatch between a square or rectangular waveguide and a regular optical fiber is therefore largely reduced. The fiber-waveguide-fiber coupling loss drops from 1.8 dB to 0.5 dB or less for step index multimode waveguides by applying this technique. The heat treatment applied in the waveguide rounding process also smooths the waveguide sidewalls and results in much lower propagation loss in the waveguides. Uniform Y splitters were fabricated to show the feasibility of using this technique to make integrated optical devices.<>

Keywords

integrated optics; optical losses; optical waveguides; optical workshop techniques; refractive index; 0.5 dB; Y splitters; circular cross-sectioned channel waveguides; fiber-waveguide-fiber coupling loss; geometrical mismatch; heat treatment; integrated optical devices; optical fiber; optical waveguide fabrication; propagation loss; rectangular waveguide; square waveguide; step index multimode waveguides; waveguide rounding process; waveguide sidewalls; Etching; Hafnium; Heat treatment; Optical fiber losses; Optical fibers; Optical waveguides; Planar waveguides; Propagation losses; Rectangular waveguides; Silicon compounds;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.79766

Filename

79766