DocumentCode :
1347406
Title :
High Efficiency Injectorless Quantum Cascade Lasers Emitting at 8.8 
m With 2-W Peak Pulsed Power per Facet at Room Temperature
Author :
Li, H. ; Katz, Simeon ; Vizbaras, Augustinas ; Boehm, Gehard ; Amann, Markus-Christian
Author_Institution :
Walter Schottky Inst., Tech. Univ. Munchen, Garching, Germany
Volume :
22
Issue :
24
fYear :
2010
Firstpage :
1811
Lastpage :
1813
Abstract :
An injectorless quantum cascade laser design using four material alloys and emitting around 8.8 at room temperature is presented. The coupling energy between the injection state and the upper laser level was increased compared to other injectorless designs to 10.6 meV. Devices with 85 repeats produce 2.0 W of pulsed output power per facet and an overall efficiency of 7.2% at 300 K. The threshold current density at room temperature is as low as 1.15 for an as-cleaved 4-mm-long device, with a characteristic temperature of 162 K.
Keywords :
current density; optical couplers; optical design techniques; quantum cascade lasers; coupling energy; high efficiency injectorless quantum cascade lasers; injection state; material alloys; power 2 W; pulsed output power; pulsed power; temperature 162 K; temperature 293 K to 298 K; temperature 300 K; threshold current density; upper laser level; wavelength 8.8 mum; Materials; Photonics; Power generation; Quantum cascade lasers; Temperature; Temperature measurement; Threshold current; Injectorless; midinfrared; 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.2010.2086390
Filename :
5599286
Link To Document :
