Spatial optical solitons in nonlinearly coupled lithium niobate waveguides

Author

Falco, Andrea Di ; Assanto, Gaetano

Author_Institution

Dept. of Electron. Eng., Univ. Roma Tre, Rome, Italy

Volume

15

Issue

4

fYear

2003

fDate

4/1/2003 12:00:00 AM

Firstpage

537

Lastpage

539

Abstract

We numerically investigate a novel type of quadratic spatial solitons in the system of surface and buried planar waveguides obtained via direct- and reverse-proton exchange in z-cut lithium niobate, respectively, and coupled by the second-order susceptibility. Through frequency doubling, transverse-electric and transverse-magnetic modes lock into a 1+1D solitary wave encompassing orthogonal field components at the two harmonic wavelengths. The phase matching scheme leads to a wavelength-comb filter with adjustable linewidths.

Keywords

lithium compounds; nonlinear optical susceptibility; optical harmonic generation; optical phase matching; optical planar waveguides; optical solitons; optical waveguide filters; photorefractive materials; LiNbO/sub 3/; adjustable linewidths; buried planar waveguides; direct proton exchange; frequency doubling; harmonic wavelengths; nonlinearly coupled lithium niobate waveguides; orthogonal field components; phase matching; quadratic spatial solitons; reverse-proton exchange; second-order susceptibility; solitary wave; spatial optical solitons; surface planar waveguides; transverse-electric modes; transverse-magnetic modes; wavelength-comb filter; Frequency; Laser mode locking; Lithium niobate; Optical coupling; Optical planar waveguides; Optical solitons; Optical surface waves; Optical waveguides; Planar waveguides; Surface waves;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2003.809295

Filename

1190195