Remote Raman microimaging using an AOTF and a spatially coherent microfiber optical probe
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208 (United States)
- Hawaii Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu, Hawaii 96822 (United States)
A fiber-optic Raman microimaging probe is described that is suitable for acquiring high-spatial-resolution Raman images in sampling situations with no clear line of sight. A high-power near-infrared diode laser combined with an acousto-optic tunable filter and a spatially coherent optical fiber bundle allow fluorescence-free Raman images of remotely located samples to be acquired at distances up to several meters. The feasibility of this technique is demonstrated with Raman images of (1) a pellet containing a mixture of a highly scattering sample, bis-methylstyrylbenzene (BMSB), KCl, and graphite, and (2) a partially graphitized diamond. These images clearly show phase boundaries over an area of approximately 0.1 mm{sup 2} with {approximately}4-{mu}m resolution. {copyright} {ital 1996 Society for Applied Spectroscopy.}
- DOE Contract Number:
- FG02-91ER75666
- OSTI ID:
- 497638
- Journal Information:
- Applied Spectroscopy, Vol. 50, Issue 8; Other Information: PBD: Aug 1996
- Country of Publication:
- United States
- Language:
- English
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