Title :
Single-mode, tunable quantum cascade distributed feedback (QC-DFB) lasers between 4.6 and 10 /spl mu/m wavelength
Author :
Gmachl, C. ; Kohler, R. ; Capasso, F. ; Tredicucci, A. ; Hutchinson, A.L. ; Sivco, D.L. ; Baillargeon, J.N. ; Cho, A.Y.
Author_Institution :
Bell Lab., Lucent Technol., Murray Hill, NJ, USA
Abstract :
Summary form only given.Two types of single-mode, continuously tunable QC-DFB lasers are being used for gas sensing applications. First, QC-DFB lasers emitting at or close to room temperature under pulsed conditions are of importance for portable sensor systems avoiding the use of cryo-liquids or heavy cryo-coolers. Secondly, high resolution spectroscopy requires a narrow laser linewidth, only achievable under continuous wave (cw) operation. These lasers are typically operated around liquid nitrogen temperature. We demonstrate the first short wavelength (4.6-4.7 /spl mu/m) QC-DFB lasers, targeted to the detection of CO.
Keywords :
cryogenics; distributed feedback lasers; gas sensors; infrared spectroscopy; laser modes; laser tuning; quantum well lasers; spectrochemical analysis; 4.6 to 10 mum; CO; continuously tunable QC-DFB lasers; cryo-liquids; gas sensing applications; gas sensors; high resolution spectroscopy; liquid nitrogen temperature; narrow laser linewidth; pulsed conditions; single-mode tunable quantum cascade distributed feedback lasers; Distributed feedback devices; Gas lasers; Laser applications; Laser feedback; Optical pulses; Quantum cascade lasers; Sensor systems; Spectroscopy; Temperature sensors; Tunable circuits and devices;
Conference_Titel :
Lasers and Electro-Optics, 2000. (CLEO 2000). Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-634-6
DOI :
10.1109/CLEO.2000.906992
