Pulsed quantum cascade laser based hypertemporal real-time headspace measurements

T Boyson, Dylan Rittman, T Spence, M Calzada, A Kallapur, Ian Petersen, Kenneth Kirkbride, D Moore, C Harb

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)


    Optical cavity enhancement is a highly desirable process to make sensitive direct-absorption spectroscopic measurements of unknown substances, such as explosives, illicit material, or other species of interest. This paper reports advancements in the development of real-time cavity ringdown spectroscopy over a wide-bandwidth, with the aim to make headspace measurements of molecules at trace levels. We report results of two pulsed quantum cascade systems operating between (1200 to 1320)cm-1 and (1316 to 1613)cm-1 that measure the headspace of nitromethane, acetonitrile, acetone, and nitroglycerin, where the spectra are obtained in less than four seconds and contain at least 150,000 spectral wavelength datapoints.

    Original languageEnglish
    Pages (from-to)10519-10534
    Number of pages16
    JournalOptics Express
    Issue number9
    Publication statusPublished - 2014


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