Method of refractive index profile reconstruction from effective index of planar optical monomode waveguides: Application to potassium ion-exchanged waveguides

Author

Pantchev, B. ; Nikolov, Z.

Author_Institution

Inst. of Solid State Phys., Bulgarian Acad. of Sci., Sofia, Bulgaria

Volume

29

Issue

1

fYear

1993

fDate

1/1/1993 12:00:00 AM

Firstpage

154

Lastpage

160

Abstract

A simple nondestructive method for determination of refractive index profile of single-mode waveguides using the measured effective refractive indexes is proposed. The method is based on the extraction of the additional data about the waveguide profile from the investigation of its evolution with the duration of fabrication process. The profile reconstructions are carried out using an appropriate algorithm in the frames of the WKB approximation. The method is applied for few- and single-mode waveguides, obtained by K⁺-Na⁺ field assisted ion exchange. The results are corroborated with the reconstruction from the effective refractive indexes measured at a shorter wavelength, as well as with profile study by means of step-by-step etching

Keywords

approximation theory; integrated optics; ion exchange; optical waveguides; potassium; refractive index measurement; K⁺-Na⁺ field assisted ion exchange; effective index; ion-exchanged waveguides; measured effective refractive indexes; nondestructive method; planar optical monomode waveguides; refractive index profile reconstruction; single-mode waveguides; step-by-step etching; waveguide profile; Glass; Optical device fabrication; Optical planar waveguides; Optical refraction; Optical ring resonators; Optical variables control; Optical waveguides; Planar waveguides; Refractive index; Shape;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.199254

Filename

199254