Title :
A Compact Four-Wavelength Quantum-Cascade Laser Source
Author :
Toor, Fatima ; Howard, Scott S. ; Sivco, Debroah L. ; Gmachl, Claire F.
Author_Institution :
Dept. of Electr. Eng., Princeton Univ., Princeton, NJ, USA
Abstract :
A four-wavelength quantum-cascade (QC) laser source that operates using a single current channel is presented. The source includes two different heterogeneous cascade QC lasers, one with emission wavelengths of 7.0 mum and 11.2 mum, and the other with 8.7 mum and 12.0 mum . For 3.0-mm and 3.5-mm cavity lengths, QC lasers with emission wavelengths of 8.7, 11.2, and 12.0 mum have threshold current densities within less than a factor of 2, which allows them to be conveniently driven in series by a single current source.
Keywords :
current density; electro-optical effects; laser cavity resonators; quantum cascade lasers; four-wavelength quantum-cascade laser; laser cavity length; multiwavelength laser; single current channel threshold current density; size 3 mm; wavelength 11.2 mum; wavelength 12 mum; wavelength 3.5 mm; wavelength 7 mum; wavelength 8.7 mum; Chemical lasers; Gas lasers; Laser modes; Laser theory; Laser transitions; Optical design; Quantum cascade lasers; Quantum well lasers; Semiconductor lasers; Waveguide lasers; Mid-infrared; multiwavelength lasers; quantum-cascade (QC) laser; semiconductor lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2009.2014882
