Measurement of Multi-Exponential Decays by Phase-Shift Cavity Ring-Down (Articolo in rivista)

Type
Label
  • Measurement of Multi-Exponential Decays by Phase-Shift Cavity Ring-Down (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Barnes J.A., Bescherer K., Dias S., Gagliardi G., Loock H.P., Trefiak N.R., Waechter H., Yam S. (2009)
    Measurement of Multi-Exponential Decays by Phase-Shift Cavity Ring-Down
    in Applied physics. B, Lasers and optics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Barnes J.A., Bescherer K., Dias S., Gagliardi G., Loock H.P., Trefiak N.R., Waechter H., Yam S. (literal)
Pagina inizio
  • 1 (literal)
Pagina fine
  • 9 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 95 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Department of Chemistry, Queens University, Kingston, ON, K7L 3N6, Canada; CNR - Istituto Nazionale di Ottica Applicata, Pozzuoli (Naples), Italy; Department of Electrical and Computer Engineering, Queens University, Kingston, ON, K7L 3N6, Canada (literal)
Titolo
  • Measurement of Multi-Exponential Decays by Phase-Shift Cavity Ring-Down (literal)
Abstract
  • Multi-exponential decay waveforms are common occurrences in cavity ring-down spectroscopy and the respective ring-down times are typically obtained by fitting the ring-down waveform to the sum of exponential decay functions. In phase-shift cavity ring-down (CRD) spectroscopy the measurement of a single phase angle will not provide sufficient information and needs to be complemented by either intensity measurements or phase angle measurements at different modulation frequencies. Here, a formalism analogous to that developed for fluorescence lifetime spectroscopy is adapted to the phase-shift CRD technique and is tested for two types of waveguide CRD systems: (1) a single-mode fiber cavity in which light is confined by two identical Fiber Bragg Gratings and (2) a multimode fiber loop. By measuring the phase angle at different modulation frequencies, lifetimes for up to three different decay processes were obtained (literal)
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