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Photonics 2019, 6(1), 31; https://doi.org/10.3390/photonics6010031

Long Wavelength (λ > 17 µm) Distributed Feedback Quantum Cascade Lasers Operating in a Continuous Wave at Room Temperature

IES, University of Montpellier, CNRS, 34095 Montpellier, France
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Author to whom correspondence should be addressed.
Present address: Graduate School of Engineering, Nagoya University, Chikusa-ku 464-8603, Nagoya, Japan.
Received: 1 March 2019 / Revised: 15 March 2019 / Accepted: 19 March 2019 / Published: 21 March 2019
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Abstract

The extension of the available spectral range covered by quantum cascade lasers (QCL) would allow one to address new molecular spectroscopy applications, in particular in the long wavelength domain of the mid-infrared. We report in this paper the realization of distributed feedback (DFB) QCLs, made of InAs and AlSb, that demonstrated a continuous wave (CW) and a single mode emission at a wavelength of 17.7 µm, with output powers in the mW range. This is the longest wavelength for DFB QCLs, and for any QCLs or semiconductor lasers in general, operating in a CW at room temperature. View Full-Text
Keywords: quantum cascade laser; distributed feedback; long wavelength infrared; molecular spectroscopy quantum cascade laser; distributed feedback; long wavelength infrared; molecular spectroscopy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Nguyen Van, H.; Loghmari, Z.; Philip, H.; Bahriz, M.; Baranov, A.N.; Teissier, R. Long Wavelength (λ > 17 µm) Distributed Feedback Quantum Cascade Lasers Operating in a Continuous Wave at Room Temperature. Photonics 2019, 6, 31.

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