Intensity Considerations in Liquid Core Optical Fiber Raman Spectroscopy
| Autor: | Michelle Duval Malinsky, Ilia Koev, Richard P. Van Duyne, Robert I. Altkorn |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Materials science
business.industry 010401 analytical chemistry Polarization-maintaining optical fiber 01 natural sciences Graded-index fiber 0104 chemical sciences 010309 optics symbols.namesake X-ray Raman scattering Optics 0103 physical sciences symbols Figure of merit Coherent anti-Stokes Raman spectroscopy Raman spectroscopy business Instrumentation Spectroscopy Raman scattering Photonic-crystal fiber |
| Zdroj: | Applied Spectroscopy. 55:373-381 |
| ISSN: | 1943-3530 0003-7028 |
| Popis: | This paper develops expressions for the Raman power emitted by liquid core optical fiber (LCOF) sample cells in six simple excitation/collection geometries and the fraction of that power that can be utilized in a conventional Raman spectrometer. From these expressions a “figure of merit” is developed that can be used to predict the relative intensity enhancement provided by LCOFs having different inside diameters and loss characteristics. For the apparatus used here, we show theoretically and experimentally that the figure of merit takes the simple form (α d)−1 where α and d are, respectively, the loss coefficient and inside diameter of the LCOF. Given the varying optical quality of Teflon®-AF LCOFs currently in use, the analysis presented here should be useful in optimizing the performance of LCOF accessories in Raman and related spectroscopic applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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