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A long-wave infra-red pulsed external-cavity QCL spectrometer using a hollow waveguide gas cell: Data

A spectrometer built using an external cavity pulsed quantum cascade laser is described. The spectrometer has a tuning range from 10 – 13 um (1,000 – 769 cm-1) and is designed to target volatile organic compounds (VOCs) which often exhibit water-free molecular absorption within the region. The spectrometer utilizes a hollow silica waveguide gas cell which has an internal volume of a few millilitres, a fast response time (~1 s), and is advantageous when only low sample volumes, similar to the cell volume, are available.  

Funding

Point of care diagnosis of gastrointestinal disease using laser spectroscopy

Engineering and Physical Sciences Research Council

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Authoriser (e.g. PI/supervisor)

daniel.francis@cranfield.ac.uk

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