Abstract
Heterogeneous quantum cascade lasers have emerged as an important broadband radiation source for mid-infrared spectroscopy and sensing. Multiple quantum cascade stages with discrete peak wavelengths are grown together in single active region to have a broad gain. Different wavelength laser can be chosen by appropriate feedback mechanism. Heterogeneous strain-balanced Al0.63In0.37As/ Ga0.35In0.65As/Ga0.47In0.53As quantum cascade lasers, having 5 and 6 quantum cascade stages respectively, has been demonstrated with gain between 6.2-9.9 μm and 5.9-10.9 μm in mid-infrared region.
Original language | English (US) |
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Pages (from-to) | 135-143 |
Number of pages | 9 |
Journal | NATO Science for Peace and Security Series B: Physics and Biophysics |
Volume | PartF1 |
DOIs | |
State | Published - 2017 |
Keywords
- Broadband laser
- Mid-infrared
- Quantum cascade lasers
- Semiconductor lasers
ASJC Scopus subject areas
- Biotechnology
- Biophysics
- General Physics and Astronomy
- Electrical and Electronic Engineering