Top Notch Design for Fiber-Loop Cavity Ring-Down Spectroscopy

Top Notch Design for Fiber-Loop Cavity Ring-Down Spectroscopy

Fiber-loop cavity ring-down spectroscopy (CRDS) is a highly sensitive spectroscopic absorption technique which has shown considerable promise for the analysis of small-volume liquid samples. We have developed a new light coupling method for fiber-loop CRDS, which overcomes two disadvantages of the t...

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Veröffentlicht in:Analytical chemistry (Washington) 2011-11, Vol.83 (22), p.8492-8500
Hauptverfasser: Rushworth, Cathy M, James, Dean, Lee, Jason W. L, Vallance, Claire
Format: Artikel
Sprache:eng
Schlagworte:
Analytical chemistry
Chemical compounds
Chemistry
Equipment Design
Exact sciences and technology
Fiber optics
Rhodamines - analysis
Rhodamines - chemistry
Spectrometric and optical methods
Spectrum analysis
Spectrum Analysis - instrumentation
Spectrum Analysis - methods
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Zusammenfassung:Fiber-loop cavity ring-down spectroscopy (CRDS) is a highly sensitive spectroscopic absorption technique which has shown considerable promise for the analysis of small-volume liquid samples. We have developed a new light coupling method for fiber-loop CRDS, which overcomes two disadvantages of the technique: low efficiency light coupling into the cavity and high loss per pass. The coupler is based on a 45° reflective notch polished between 10 and 30 μm into the core of a large-core-diameter (365 μm) optical fiber, and allows for nearly 100% light coupling into the cavity, with a low loss per pass (
ISSN:0003-2700
1520-6882
DOI:10.1021/ac201775f