LiNbO3TE-TM mode converter using collinear acoustooptic interaction

Author

Ohmachi, Yoshiro ; Noda, Juichi

Author_Institution

Nippon Telegraph and Telephone Public Corporation, Musashuno-shi, Tokyo, Japan

Volume

13

Issue

2

fYear

1977

fDate

2/1/1977 12:00:00 AM

Firstpage

43

Lastpage

46

Abstract

A highly efficient TE-TM mode conversion device utilizing the acoustooptic effect has been demonstrated. Mode conversion has been made by an acoustic surface wave propagating collinearly with an optical guided wave. The maximum mode conversion, although the fraction was restricted to 70 percent, has been obtained with an acoustic power of only 55 mW (electrical input 0.55 W). Effective interaction length of the present device is limited to 5 mm due to optical and/or acoustic inhomogeneity of the waveguides. For selecting TE and TM waves, a polarizer is constructed monolithically and the extinction ratio is improved by up to 21 dB. Performance characteristics of a tunable optical filter of this type of the mode conversion are also discussed.

Keywords

Acoustic devices; Acoustic propagation; Acoustic waves; Acoustooptic effects; Optical filters; Optical propagation; Optical surface waves; Optical waveguides; Surface acoustic wave devices; Surface acoustic waves;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.1977.1069276

Filename

1069276