Summary form only given. A tunable diode laser absorption spectrometer using near-infrared InGaAs DFB lasers and detectors has been developed to make balloon-borne measurements of stratospheric tracer species such as methane. The instrument combines second harmonic wavelength modulation spectroscopy with a folded optical path of 101 metres to enable detection of absorptions of less than one part in 10/sup 6/ (with a one second time constant). The long optical path is achieved using a specially designed astigmatic Herriott cell, which gives 202 passes across a base path of 0.5 m. The optical properties of the cell have been modelled, and the agreement between the modelled and the observed spot patterns on the mirror is shown. This design of cell has been shown through modelling and experiment to have a high level of inherent stability against mechanical misalignments and minimal optical fringing.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A lightweight high-sensitivity laser spectrometer for the measurement of trace stratospheric species


    Contributors:
    Gardiner, T. (author) / Howieson, I. (author) / Swann, N. (author) / Hansford, G. (author)


    Publication date :

    1999-01-01


    Size :

    271212 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Improved measurement and calibration for stratospheric trace species

    Perry, T. W. / Parsons, C. / Torres, A. L. | NTRS | 1980


    Balloon measurements of stratospheric trace species using a multichannel UV-visible spectrometer

    Naudet, J. P. / Robert, C. / Huguenin, D. | British Library Online Contents | 1994


    Balloon measurements of stratospheric trace species using a multichannel UV-visible spectrometer

    Naudet, J. P. / Robert, C. / Huguenin, D. et al. | British Library Conference Proceedings | 1994


    A midinfrared laser spectrometer for the in-situ measurement of stratospheric nitrous oxide

    D'Amato, F. / De Rosa, M. / Mazzinghi, P. et al. | IEEE | 2003


    New Performances of the UV-Visible Spectrometer "Salomon" Dedicated to Measurements of Night-Time Stratospheric Trace Gas Species

    Berthet, G. / European Space Agency / Centre National d'Etudes Spatiales | British Library Conference Proceedings | 2001