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Proceedings Paper

Fiber-optic Raman probe based on single-crystal sapphire fiber
Author(s): Tongqing Liu; Ming Han; Cody Raml; Dennis R. Alexander; Xiangnan He; Yongfeng Lu
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Paper Abstract

We demonstrate a fiber-optic Raman probe based on single-crystal sapphire fibers to overcome the large background signal of Raman probes based on standard glass fibers. Using 514.5 nm and 785 nm excitation lasers, Raman spectroscopy was performed on samples of calcite, aqueous sodium carbonate solution, and silicon wafer using a single crystal sapphire fiber and a silica fiber of similar lengths and numerical apertures. The single-crystal sapphire fiber exhibits narrow Raman peaks and low background signal, allowing for the detection of weaker Raman signals or Raman signals located in the lower wavenumber region, while the traditional silica fiber has a strong broadband Raman spectrum of its own.

Paper Details

Date Published: 17 May 2012
PDF: 6 pages
Proc. SPIE 8374, Next-Generation Spectroscopic Technologies V, 83740P (17 May 2012); doi: 10.1117/12.920780
Show Author Affiliations
Tongqing Liu, Univ. of Nebraska-Lincoln (United States)
Ming Han, Univ. of Nebraska-Lincoln (United States)
Cody Raml, Univ. of Nebraska-Lincoln (United States)
Dennis R. Alexander, Univ. of Nebraska-Lincoln (United States)
Xiangnan He, Univ. of Nebraska-Lincoln (United States)
Yongfeng Lu, Univ. of Nebraska-Lincoln (United States)

Published in SPIE Proceedings Vol. 8374:
Next-Generation Spectroscopic Technologies V
Mark A. Druy; Richard A. Crocombe, Editor(s)

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