Two-dimensional mode size transformation by Δn-controlled polymer waveguides

Author

Inaba, Ryoji ; Kato, Miwa ; Sagawa, Masakazu ; Aknhoshi, H.

Author_Institution

Res. Lab., Hitachi Ltd., Ibaraki, Japan

Volume

16

Issue

4

fYear

1998

fDate

4/1/1998 12:00:00 AM

Firstpage

620

Lastpage

624

Abstract

We report a new type of polymer waveguide for two-dimensional (2-D) mode size transformation in which Δn (refractive index difference between core and cladding) is properly controlled along the waveguide axis while the core cross section is kept uniform. The beam diameter in the Δn-controlled waveguide where the core diameter is 3.7 μm and Δn changes from 0.0027 to 0.0009 toward one end in the 5 mm-gradient Δn, region, is about twice as large as that in a normal waveguide where Δn is 0.0027. The optical loss accompanied by mode size transformation is calculated to be less than 2.5% based on beam propagation methods (BPM´s)

Keywords

claddings; optical communication equipment; optical losses; optical polymers; optical waveguide theory; optical waveguides; refractive index; Δn-controlled polymer waveguides; 2D mode size transformation; 3.7 mum; beam diameter; beam propagation methods; core cross section; core diameter; mode size transformation; optical loss; refractive index difference; waveguide axis; Optical losses; Optical refraction; Optical variables control; Optical waveguides; Polymers; Propagation losses; Refractive index; Size control; Two dimensional displays; Waveguide transitions;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.664073

Filename

664073