DocumentCode :
917303
Title :
Short-Wavelength (λ ≈ 3.6 μm) In0.73Ga0.27Asndash;AlAsndash;InP Quantum-Cascade Laser
Author :
Semtsiv, Mykhaylo P. ; Dressler, Sebastian ; Masselink, William Ted
Author_Institution :
Phys. Dept., Humboldt-Univ., Berlin
Volume :
43
Issue :
1
fYear :
2007
Firstpage :
42
Lastpage :
46
Abstract :
We describe the design and implementation of a short-wavelength quantum-cascade laser emitting in the range of 3.6-3.7 mum at 77 K and in the range of 3.8-3.9 mum at 300 K. The shortest wavelength laser emission observed at 77 K is lambda=3.62 mum. The active region is based on the strain-compensated In0.73Ga0.27As-AlAs heterosystem on InP. The laser operates in pulsed mode up to 300 K, and in continuous-wave mode at 77 K. Laser threshold current densities are as low as 600 A/cm2 at 10 K, 800 A/cm2 at 77 K, and 3.8 kA/cm2 at 300 K in pulsed mode. The temperature coefficient T0 is as high as 143 K. Driven with 50% duty cycle at 77 K, lasers deliver up to 70 mW average power per facet and the differential quantum efficiency is as high as 14% per cascade
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; indium compounds; infrared sources; laser modes; quantum cascade lasers; stimulated emission; 143 K; 3.6 to 3.7 mum; 300 K; 70 mW; 77 K; In0.73Ga0.27As-AlAs-InP; continuous-wave mode; differential quantum efficiency; laser emission; laser threshold current densities; pulsed mode operation; quantum-cascade laser; short-wavelength laser; strain compensated heterosystem; temperature coefficient; Conducting materials; Gas lasers; Indium phosphide; Laser modes; Laser transitions; Optical design; Optical pulses; Quantum cascade lasers; Temperature; Threshold current; Midinfrared; quantum-cascade laser (QCL); strain-compensated;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/JQE.2006.884577
Filename :
4049862
Link To Document :