Raman fiber optic probe assembly for use in hostile environments
Abstract
This invention provides a device for Raman spectroscopic measurement of composition and concentrations in a hostile environment by the use of a first fiber optic as a means of directing high intensity monochromatic light from a laser to the hostile environment and a second fiber optic to receive the lower intensity scattered light for transmittal to a monochromator for analysis. To avoid damage to the fiber optics, they are protected from the hostile environment. A preferred embodiment of the Raman fiber optic probe is able to obtain Raman spectra of corrosive gases and solutions at temperatures up to 600.degree. F. and pressures up to 2000 psi. The incident exciting fiber optic cable makes an angle of substantially 90.degree. with the collecting fiber optic cable. This 90.degree. geometry minimizes the Rayleigh scattering signal picked up by the collecting fiber, because the intensity of Rayleigh scattering is lowest in the direction perpendicular to the beam path of the exciting light and therefore a 90.degree. scattering geometry optimizes the signal to noise ratio.
- Inventors:
-
- Hurt, VA
- Pittsburgh, PA
- Bethel Park, PA
- Harrison City, PA
- Issue Date:
- Research Org.:
- Westinghouse Electric Corp., Pittsburgh, PA (United States)
- OSTI Identifier:
- 873228
- Patent Number(s):
- 6115528
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
- DOE Contract Number:
- AC11-89PN38014
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- raman; fiber; optic; probe; assembly; hostile; environments; provides; device; spectroscopic; measurement; composition; concentrations; environment; means; directing; intensity; monochromatic; light; laser; receive; scattered; transmittal; monochromator; analysis; avoid; damage; optics; protected; preferred; embodiment; obtain; spectra; corrosive; gases; solutions; temperatures; 600; degree; pressures; 2000; psi; incident; exciting; cable; makes; angle; substantially; 90; collecting; geometry; minimizes; rayleigh; scattering; signal; picked; lowest; direction; perpendicular; beam; path; optimizes; noise; ratio; direction perpendicular; avoid damage; probe assembly; fiber optics; scattered light; fiber optic; preferred embodiment; optic cable; beam path; hostile environment; optic probe; hostile environments; noise ratio; corrosive gases; raman spectra; monochromatic light; exciting light; spectroscopic measurement; corrosive gas; chromatic light; /385/356/
Citation Formats
Schmucker, John E, Falk, Jon C, Archer, William B, and Blasi, Raymond J. Raman fiber optic probe assembly for use in hostile environments. United States: N. p., 2000.
Web.
Schmucker, John E, Falk, Jon C, Archer, William B, & Blasi, Raymond J. Raman fiber optic probe assembly for use in hostile environments. United States.
Schmucker, John E, Falk, Jon C, Archer, William B, and Blasi, Raymond J. Sat .
"Raman fiber optic probe assembly for use in hostile environments". United States. https://www.osti.gov/servlets/purl/873228.
@article{osti_873228,
title = {Raman fiber optic probe assembly for use in hostile environments},
author = {Schmucker, John E and Falk, Jon C and Archer, William B and Blasi, Raymond J},
abstractNote = {This invention provides a device for Raman spectroscopic measurement of composition and concentrations in a hostile environment by the use of a first fiber optic as a means of directing high intensity monochromatic light from a laser to the hostile environment and a second fiber optic to receive the lower intensity scattered light for transmittal to a monochromator for analysis. To avoid damage to the fiber optics, they are protected from the hostile environment. A preferred embodiment of the Raman fiber optic probe is able to obtain Raman spectra of corrosive gases and solutions at temperatures up to 600.degree. F. and pressures up to 2000 psi. The incident exciting fiber optic cable makes an angle of substantially 90.degree. with the collecting fiber optic cable. This 90.degree. geometry minimizes the Rayleigh scattering signal picked up by the collecting fiber, because the intensity of Rayleigh scattering is lowest in the direction perpendicular to the beam path of the exciting light and therefore a 90.degree. scattering geometry optimizes the signal to noise ratio.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}