DocumentCode
1331304
Title
Single-mode tunable quantum cascade lasers in the spectral range of the CO2 laser at /spl lambda/=9.5-10.5 μm
Author
Kohler, R. ; Gmachl, C. ; Capasso, F. ; Tredicucci, A. ; Sivco, D.L. ; Cho, A.Y.
Author_Institution
Tech. Univ. Berlin, Germany
Volume
12
Issue
5
fYear
2000
fDate
5/1/2000 12:00:00 AM
Firstpage
474
Lastpage
476
Abstract
Widely tunable, single-mode quantum cascade distributed feedback (QC-DFB) lasers based on a complex coupling scheme and operating in the wavelength range of the CO2 laser (/spl lambda//spl ap/9.5-10.5 μm) are reported. Dynamic single-mode emission up to high current levels is obtained. The continuous single-mode tuning range is 150 nm, while the tuning range of the equivalent Fabry-Perot laser is /spl sim/400 nm. By homogeneously reducing all layer thicknesses by 10%, the wavelength coverage of a single QC-laser design can be extended to cover one entire regular band of the fundamental CO2 laser spectrum.
Keywords
distributed feedback lasers; laser modes; laser tuning; quantum well lasers; waveguide lasers; 9.5 to 10.5 mum; CO/sub 2/ laser wavelength range; complex coupling scheme; continuous single-mode tuning range; dynamic single-mode emission; equivalent Fabry-Perot laser; homogeneous layer thickness reduction; mid-infrared wavelengths; single-mode quantum cascade distributed feedback lasers; single-mode tunable quantum cascade lasers; wavelength coverage; Bars; Distributed feedback devices; Gas lasers; Laser feedback; Laser transitions; Laser tuning; Quantum cascade lasers; Quantum well lasers; Semiconductor lasers; Tunable circuits and devices;
fLanguage
English
Journal_Title
Photonics Technology Letters, IEEE
Publisher
ieee
ISSN
1041-1135
Type
jour
DOI
10.1109/68.841257
Filename
841257
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