A Raman Fiber Optic Probe Assembly for use in Hostile Environments
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 to 600 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.
- Research Organization:
- Bettis Atomic Power Lab., West Mifflin, PA (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC11-88PN38014
- Assignee:
- DOEGC; EDB-01:069629
- Patent Number(s):
- PATENTS-US-A9157266
- Application Number:
- 9-157,266; TRN: AH200127%%19
- OSTI ID:
- 782834
- Resource Relation:
- Patent File Date: 1998 Sep 21; Other Information: PBD: 21 Sep 1998
- Country of Publication:
- United States
- Language:
- English
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