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Simultaneous multipoint fiber optic Raman sampling for chemical process control using diode lasers and a CCD detector
Author(s): S. Michael Angel; Thomas M. Vess; Michael L. Myrick
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Paper Abstract

A diode-laser-based portable Raman spectrometer is described that uses a 2-dimensional-array detector (charge-coupled device--CCD) to simultaneously measure chemical processes at several remote points using fiber optics. Optical multiplexing with the CCD allows simultaneous measurements with little loss of sensitivity and the low-energy near-visible (NVIS) excitation (e.g., 786 to 820 nm) prevents most sample luminescence. Several fiber- optic sensor configurations optimized for particular applications, including surface-enhanced Raman (SER), are presented. Applications are described including in-situ epoxy cure chemistry monitoring in a curing oven, monitoring a distillation apparatus, and mixed waste monitoring. Some of the limitations of the system are discussed.

Paper Details

Date Published: 1 March 1992
PDF: 13 pages
Proc. SPIE 1587, Chemical, Biochemical, and Environmental Fiber Sensors III, (1 March 1992); doi: 10.1117/12.56549
Show Author Affiliations
S. Michael Angel, Lawrence Livermore National Lab. (United States)
Thomas M. Vess, Lawrence Livermore National Lab. (United States)
Michael L. Myrick, Univ. of South Carolina (United States)

Published in SPIE Proceedings Vol. 1587:
Chemical, Biochemical, and Environmental Fiber Sensors III

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