Apparatus for measuring Raman spectra over optical fibers

Details Apparatus for measuring Raman spectra over optical fibers Apparatus for measuring Raman spectra over optical fibers

1989-11-28

1992-05-12

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

With raman type light scattering

25022723, G01J 344

Patent

active

051121271

ABSTRACT:
A fiber-optic probe which is useful for measuring Raman spectra of samples remote from the light source and detector. The probe head contains optical components which selectively remove unwanted fluorescence and Raman scattering arising from the interaction between the Raman excitation source radiation and the input optical fiber. The optics also filter the Raman excitation source into a return optical fiber leading to a spectrometer or detector. In one embodiment, the disposition of optical components provides a compact probe geometry with parallel input and output fibers at one end and a sampling port at the other end. An encasement for the optics is also disclosed, for sealing the components against the environment, and for coupling the probe to specialized sampling attachments, such as for conducting Surface Enhanced Raman Spectroscopy.

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