Microoptoelectromechanical systems-based external cavity quantum cascade lasers for real-time spectroscopy

We report on mid-IR spectroscopic measurements performed with rapidly tunable external cavity quantum cascade lasers (EC-QCLs). Fast wavelength tuning in the external cavity is realized by a microoptoelectromechanical systems (MOEMS) grating oscillating at a resonance frequency of about 1 kHz with a...

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Bibliographic Details
Published in:Optical engineering 2018-01, Vol.57 (1), p.011010-011010
Main Authors: Butschek, Lorenz, Hugger, Stefan, Jarvis, Jan, Haertelt, Marko, Merten, André, Schwarzenberg, Markus, Grahmann, Jan, Stothard, David, Warden, Matthew, Carson, Christopher, Macarthur, John, Fuchs, Frank, Ostendorf, Ralf, Wagner, Joachim
Format: Article
Language:English
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Summary:We report on mid-IR spectroscopic measurements performed with rapidly tunable external cavity quantum cascade lasers (EC-QCLs). Fast wavelength tuning in the external cavity is realized by a microoptoelectromechanical systems (MOEMS) grating oscillating at a resonance frequency of about 1 kHz with a deflection amplitude of up to 10 deg. The entire spectral range of the broadband QCL can therefore be covered in just 500  μs, paving the way for real-time spectroscopy in the mid-IR region. In addition to its use in spectroscopic measurements conducted in backscattering and transmission geometry, the MOEMS-based laser source is characterized regarding pulse intensity noise, wavelength reproducibility, and spectral resolution.
ISSN:0091-3286
1560-2303
DOI:10.1117/1.OE.57.1.011010