Analysis of periodically segmented waveguide mode expanders

Author

Weissman, Z. ; Hendel, I.

Author_Institution

Fac. of Eng., Tel Aviv Univ., Israel

Volume

13

Issue

10

fYear

1995

fDate

10/1/1995 12:00:00 AM

Firstpage

2053

Lastpage

2058

Abstract

Periodically segmented waveguide (PSW) mode expanders can be realized simply, using a single step lithography. In this paper such devices are studied numerically, with respect to high-Δ silica waveguides and InP strip waveguides. The efficiency of such expanders is shown to be high, for proper length and segmentation period, and back reflection is negligible. It is shown that lithographical grids of 0.125-0.25 μm resolution are sufficient to obtain efficient out-coupling. Basic design rules are outlined

Keywords

integrated optics; optical couplers; optical design techniques; optical waveguide theory; photolithography; refractive index; 0.125 to 0.25 mum; InP; InP strip waveguides; back reflection; basic design rules; efficient out-coupling; high-Δ silica waveguides; lithographical grids; periodically segmented waveguide mode expander analysis; proper length; segmentation period; single step lithography; Electrooptical waveguides; Fabrication; Indium phosphide; Integrated optics; Lithography; Optical coupling; Optical reflection; Optical waveguides; Silicon compounds; Strips;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.469728

Filename

469728