External cavity laser with high-sidemode suppression ratio using grating-assisted directional coupler

Author

Lim, Jong Hoon ; Song, Jeong Hwan ; Kim, Ryun Kyung ; Lee, Kyung Shik ; Kim, Jong Ryeol

Author_Institution

Sch. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon, South Korea

Volume

17

Issue

11

fYear

2005

Firstpage

2430

Lastpage

2432

Abstract

We propose and demonstrate, for the first time, a method to improve the sidemode suppression ratio (SMSR) of an external cavity laser (ECL) with a grating-assisted directional coupler as an external mirror. The ECL consisting of a Fabry-Pe´rot laser diode and a grating-assisted coupler exhibited single-longitudinal-mode oscillation at Bragg wavelength with a high SMSR of 60 dB without any additional devices.

Keywords

diffraction gratings; laser cavity resonators; mirrors; optical communication equipment; optical directional couplers; semiconductor lasers; Bragg wavelength; Fabry-Perot laser diode; external cavity laser; external mirror; grating-assisted directional coupler; sidemode suppression ratio; single-longitudinal-mode oscillation; Bragg gratings; Crosstalk; Directional couplers; Distributed feedback devices; Laser modes; Light sources; Mirrors; Optical filters; Optical reflection; Wavelength division multiplexing; External cavity laser (ECL); grating-assisted directional coupler; planar lightwave circuit (PLC); sidemode suppression ratio (SMSR);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2005.857578

Filename

1522343