Recent progress in the development of room temperature, continuous wave, widely tunable, mode-hop-free mid-infrared external cavity quantum cascade laser (EC-QCL) spectroscopic sources is reported. A single mode tuning range of 155 cm-1 (∈8% of the center wavelength) with a maximum power of 11.1 mW and 182 cm-1 (∈15% of the center wavelength) with a maximum power of 50 mW was obtained for 5.3 and 8.4 μm EC-QCLs respectively. This technology is particularly suitable for high resolution spectroscopic applications, multi species trace-gas detection and spectroscopic measurements of broadband absorbers. Several examples of spectroscopic measurements performed using EC-QCL based spectrometers are demonstrated. © 2008 Springer-Verlag.
CITATION STYLE
Wysocki, G., Lewicki, R., Curl, R. F., Tittel, F. K., Diehl, L., Capasso, F., … Faist, J. (2008). Widely tunable mode-hop free external cavity quantum cascade lasers for high resolution spectroscopy and chemical sensing. In Applied Physics B: Lasers and Optics (Vol. 92, pp. 305–311). https://doi.org/10.1007/s00340-008-3047-x
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