• Login
    View Item 
    •   Home
    • Graduate Theses, Dissertations and Projects
    • Queen's Graduate Theses and Dissertations
    • View Item
    •   Home
    • Graduate Theses, Dissertations and Projects
    • Queen's Graduate Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Ringdown spectroscopy in optical waveguides

    Thumbnail
    View/Open
    Trefiak_Nicholas_N_200707_MSc.pdf (4.915Mb)
    Date
    2007-07-05
    Author
    Trefiak, Nicholas Ronald
    Metadata
    Show full item record
    Abstract
    Ringdown spectroscopy (RDS) is an absorption spectroscopic and detection

    technique that makes use of an optical cavity to realize a long effective pathlength

    through a sample and to render the measurement independent of intensity. These two

    features give RDS an advantage over traditional absorption techniques and allows its

    application in measuring concentrations of strongly absorbing analytes present in trace

    amounts, or in measuring weak absorptions for analytes in higher concentrations. The

    resonant optical cavities used here are created from optical fibre. This permits the easy

    construction of an inexpensive apparatus for RDS. The performance of various cavity

    geometries (linear, circular) in three ranges of the visible and near infrared spectrum (405,

    800, and 1550 nm) was examined. Concurrent multiexponential decays arising from core

    modes, cladding modes, and amplified spontaneous emission were analyzed in the

    framework of an exponential decay model transformed into the frequency domain.

    The small mode field diameter of light within a fibre is well suited to probing very

    small liquid volumes on the order of pico- or femtolitres. This uniquely positions optical

    waveguide-based RDS for application in absorption detection for separation techniques

    such as capillary electrophoresis (CE) and high performance liquid chromatography

    (HPLC) where high time resolution detection is required across narrow separation

    channels. The experimental and theoretical work presented here was preformed with an

    eye towards this purpose.
    URI for this record
    http://hdl.handle.net/1974/436
    Collections
    • Queen's Graduate Theses and Dissertations
    • Department of Chemistry Graduate Theses
    Request an alternative format
    If you require this document in an alternate, accessible format, please contact the Queen's Adaptive Technology Centre

    DSpace software copyright © 2002-2015  DuraSpace
    Contact Us
    Theme by 
    Atmire NV
     

     

    Browse

    All of QSpaceCommunities & CollectionsPublished DatesAuthorsTitlesSubjectsTypesThis CollectionPublished DatesAuthorsTitlesSubjectsTypes

    My Account

    LoginRegister

    Statistics

    View Usage StatisticsView Google Analytics Statistics

    DSpace software copyright © 2002-2015  DuraSpace
    Contact Us
    Theme by 
    Atmire NV