Title :
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
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);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.857578
