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Design of fiber optic probes for laser light scatteringA quantitative analysis is presented of the role of optical fibers in laser light scattering. Design of a general fiber optic/microlens probe by means of ray tracing is described. Several different geometries employing an optical fiber of the type used in lightwave communications and a graded index microlens are considered. Experimental results using a nonimaging fiber optic detector probe show that due to geometrical limitations of single mode fibers, a probe using a multimode optical fiber has better performance, for both static and dynamic measurements of the scattered light intensity, compared with a probe using a single mode fiber. Fiber optic detector probes are shown to be more efficient at data collection when compared with conventional approaches to measurements of the scattered laser light. Integration of fiber optic detector probes into a fiber optic spectrometer offers considerable miniaturization of conventional light scattering spectrometers, which can be made arbitrarily small. In addition static and dynamic measurements of scattered light can be made within the scattering cell and consequently very close to the scattering center.
Document ID
19900007774
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dhadwal, Harbans S.
(State Univ. of New York Stony Brook, NY, United States)
Chu, Benjamin
(State Univ. of New York Stony Brook, NY, United States)
Date Acquired
August 14, 2013
Publication Date
August 1, 1989
Publication Information
Publication: NASA, Lewis Research Center, NASA Laser Light Scattering Advanced Technology Development Workshop, 1988
Subject Category
Optics
Accession Number
90N17090
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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