A Terahertz VRT spectrometer employing quantum cascade lasers
- Author(s): Cole, WTS
- Lee, AWM
- Kao, TY
- Hu, Q
- Reno, JL
- Saykally, RJ
- Hlavacek, NC
- et al.
Published Web Locationhttps://doi.org/10.1016/j.cplett.2015.08.027
© 2015 Elsevier B.V. All rights reserved. The first application of a commercial Terahertz quantum cascade laser (QCL) system for high resolution spectroscopy of supersonic beams is presented. The QCLs exhibited continuous linear voltage tuning over a 2 GHz range about a center frequency of 3.762 THz with ∼1 ppm resolution. A sensitivity of ∼1 ppm fractional absorption was measured with a single pass optical system. Multipass operation at the quantum noise limit of the stressed photoconductor detector would produce a 100-fold improvement.
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