This study discusses a sensor that relies on innovations in lasers, hollow waveguides, micromachining and microelectronics to provide sensitive and rapid measurements of trace gas concentrations. Quantum cascade (QC) distributed feedback semiconductor lasers in conjunction with unique flexible hollow waveguides that serve as a light guide and gas sample cell to produce a tunable mid-infrared (mid-IR) semiconductor laser absorption spectrometer (MIRLAS). This study uses wavelength modulation spectroscopy to provide measurements that are species specific to assure that measurements are relatively free of interference effects from other constituents of the sample stream. The small sample volumes presented by the hollow waveguide and a proprietary gas exchange mechanism provide for rapid response to gas concentration changes (< 1 s).


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Mid-infrared laser absorption spectroscopy in coiled hollow optical waveguides


    Contributors:


    Publication date :

    2003-01-01


    Size :

    176139 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




    Absorption spectroscopy in hollow-glass waveguides using infrared diode lasers [4817-25]

    Blake, T. A. / Kelly, J. F. / Stewart, T. L. et al. | British Library Conference Proceedings | 2002


    Optical waveguides for infrared laser sources

    Gannot, I. / Waynant, R.W. | IEEE | 1996


    Hollow Waveguides For Medical Infrared Lasers

    Miyagi, M. / Matsuura, Y. | IEEE | 1997


    Optical Waveguides for Infrared Laser Sources

    IEEE; Lasers and Electro-Optics Society | British Library Conference Proceedings | 1996