| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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A Broadband Pulsed External-Cavity Quantum Cascade Laser Operating near 6.9μm |
| Wei Luo, Chuan-Xi Duan** |
College of Physical Science and Technology, Central China Normal University, Wuhan 430079
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| Cite this article: |
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Wei Luo, Chuan-Xi Duan 2016 Chin. Phys. Lett. 33 024207 |
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Abstract We report an external cavity quantum cascade laser (EC-QCL) operating near 6.9 μm using the Littman–Metcalf configuration. The EC-QCL works in a pulsed mode and can be tuned continuously from 1340 to 1640 cm$^{-1}$ by only tilting the tuning mirror. The fine tuning ability of the EC-QCL is demonstrated by measuring the absorption spectrum of water in the ambient air with a lock-in amplifier.
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Received: 15 November 2015
Published: 26 February 2016
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