Title :
Asymmetric sampled grating laser array for a multiwavelength WDM source
Author :
Ryu, Sang-Wan ; Kim, Sung-Bock ; Sim, Jae-Sik ; Kim, Jeha
Author_Institution :
Electron. & Telecommun. Res. Inst., Taejon, South Korea
Abstract :
We propose a multiwavelength laser array associated with asymmetric sampled grating lasers. The laser was designed to operate at the first-order reflection of a sampled grating with the aid of an index shifter. A four-channel laser array with 400-GHz wavelength spacing was fabricated and its operation at designed wavelengths was confirmed. Individual lasers showed a threshold current of 11-17 mA and slope efficiency of around 0.18 W/A. A high side-mode suppression ratio over 39 dB was observed as well.
Keywords :
III-V semiconductors; diffraction gratings; gallium arsenide; gallium compounds; indium compounds; optical transmitters; quantum well lasers; semiconductor laser arrays; symmetry; telecommunication channels; wavelength division multiplexing; 11 to 17 mA; InGaAsP; InGaAsP MQW lasers; asymmetric sampled grating laser array; first-order reflection; four-channel laser array; high side-mode suppression ratio; index shifter; multiwavelength WDM source; multiwavelength laser array; sampled grating; slope efficiency; threshold current; wavelength spacing; Fiber lasers; Gratings; Laser feedback; Optical arrays; Optical design; Optical device fabrication; Optical feedback; Optical reflection; Semiconductor laser arrays; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.804642
