DocumentCode :
1258016
Title :
Low-Threshold Continuous-Wave Operation of Distributed-Feedback Quantum Cascade Laser at 
m
Author :
Zhang, Jinchuan ; Wang, Lijun ; Tan, Song ; Liu, Wanfeng ; Zhao, Lihua ; Liu, Fengqi ; Liu, Junqi ; Li, Lu ; Wang, Zhanguo
Volume :
23
Issue :
18
fYear :
2011
Firstpage :
1334
Lastpage :
1336
Abstract :
Room-temperature continuous-wave (CW) operation of distributed-feedback quantum cascade laser (DFB-QCL) emitting at 4.6 μm is presented. Strain-compensation combined with two-phonon resonance in active region design promises low-threshold current density. A record low-threshold current density of 1 kA/cm2 for DFB-QCL operated in CW mode at 30°C is realized without a high-reflectivity coating on the rear facet. Reliable dynamic single-mode emission with a sidemode suppression ratio of about 30 dB is achieved from 10 to 50°C.
Keywords :
current density; distributed feedback lasers; phonon-phonon interactions; quantum cascade lasers; active region design; continuous-wave operation; distributed-feedback quantum cascade laser; high-reflectivity coating; low-threshold current density; sidemode suppression ratio; strain compensation; temperature 10 degC to 50 degC; temperature 293 K to 298 K; two-phonon resonance; wavelength 4.6 mum; Distributed feedback devices; Gratings; Laser modes; Power generation; Quantum cascade lasers; Temperature measurement; Threshold current; Distributed-feedback (DFB) devices; quantum cascade lasers (QCLs); semiconductor lasers;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/LPT.2011.2160621
Filename :
5930341
Link To Document :
