Broadening of the phase-matching bandwidth in quasi-phase-matched second-harmonic generation

Author

Mizuuchi, Kiminori ; Yamamoto, Kazuhisa ; Kato, Makoto ; Sato, Hisanao

Author_Institution

Opt. Dev. Res. Lab., Matsushita Electr. Ind. Co. Ltd., Osaka, Japan

Volume

30

Issue

7

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

1596

Lastpage

1604

Abstract

We report on theoretical analysis and experiments for bandwidth broadening in quasi-phase-matched (QPM) second-harmonic generation (SHG) in LiTaO₃. QPM waveguides consisting of segments, where each segment has a phase-matching condition different from the others, are proposed to obtain a broad bandwidth and simultaneously, a high SHG efficiency. The waveguides were fabricated by adjusting the phase-matching condition either by changing the grating period of the SHG coefficient or by controlling the width of the waveguide. Consequently, the bandwidth of QPM-SHG was broadened to 0.35 nm with an SHG efficiency of 57 percent/W by modulation of the waveguide width and to 1.12 nm with an SHG efficiency of 29 percent/W by modulation of the grating period. The SHG efficiency and phase-matching characteristics in both types of waveguides showed good agreement with theoretical results

Keywords

integrated optics; lithium compounds; optical harmonic generation; optical waveguides; 29 percent; 57 percent; LiTaO₃; SHG efficiency; grating period; modulation; phase-matching bandwidth broadening; quasi-phase-matched second-harmonic generation; segmented QPM waveguide; waveguide width; Bandwidth; Chirp; Frequency conversion; Gratings; Laser theory; Optical devices; Optical frequency conversion; Optical waveguides; Solid lasers; Waveguide lasers;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.299491

Filename

299491