Title :
Watt-Level Room Temperature Continuous-Wave Operation of Quantum Cascade Lasers With λ >10 μm
Author :
Feng Xie ; Caneau, Catherine ; Leblanc, Herve P. ; Caffey, D.P. ; Hughes, Lawrence C. ; Day, T. ; Chung-en Zah
Author_Institution :
Corning, Inc., Corning, NY, USA
Abstract :
In this paper, watt-level continuous-wave (CW) output powers at wavelengths longer than 10 μm are demonstrated at room temperature with quantum cascade lasers (QCLs). CW output power of 1.15 W is demonstrated at λ ~ 10.3 μm for a QCL which has a 6-mm-long cavity and a 14-μm-wide stripe. CW output power of 1.3 W is demonstrated at λ ~ 10.7 μm for a QCL which has 6-mm-long cavity and 11.5-μm width, with a CW threshold current of 1.96 kA/cm2. Moreover, 1-W kink-free CW output power is demonstrated with a laser with a 9.5-μm-wide stripe. The maximum pulsed and CW wall plug efficiencies reached 10.4% and 4.8%, respectively, for the QCLs with λ ~ 10.7 μm.
Keywords :
kink bands; quantum cascade lasers; continuous-wave operation; continuous-wave output powers; kink-free CW output power; power 1 W; power 1.15 W; quantum cascade lasers; size 11.5 mum; size 14 mum; size 9.5 mum; temperature 293 K to 298 K; watt-level output powers; watt-level room temperature; Cavity resonators; Measurement by laser beam; Power generation; Quantum cascade lasers; Temperature measurement; Threshold current; Semiconductor lasers; quantum cascade lasers (QCLs);
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2013.2240658
