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AssigneeBoard of Regents, The University of Texas System
InventorsDigant P. Dave, Thomas E. Milner, Sergey Telenkov
Estimating the term…
One form of the present invention is a dual channel optical reflectometer composed of a birefringent path coupler and an optical source path that is optically connected to the path coupler. After entering the path coupler, light is split into birefringent reference and sample paths. The reference path is optically aligned with a first collimating lens, and the collimating lens is directed into a scanning delay line. There is also a birefringent optical sample path that is also optically connected to the path coupler. The sample path is optically aligned with a polarization channel separator/combiner and a lens, to focus and direct optical beams into the turbid sample. Light backscattered from the turbid sample is collected by the second lens and orthogonal polarization channels are reunited by the polarization channel combiner. An analog-to-digital converter is connected to the amplifier, and a computer is connected to the analog-to-digital converter to analyze the output.
A dual channel optical reflectometer comprising:
A dual channel optical reflectometer comprising:
A birefringent optical fiber sample path optically aligned with an optical component disposed to inject decorrelated light into the optical fiber sample path comprising two decorrelated light signals in orthogonal polarization channels, the sample path being further optically aligned with a collimating lens, a Wollaston prism and a focusing lens, wherein the focusing lens is disposed to focus optical beams of decorrelated light corresponding to the decorrelated polarization channels to a single point in a sample.
A method for measuring a Doppler-angle between light propagation and flow velocity vectors and comprising the steps of:
A birefringent optical fiber sample path optically aligned with an optical component disposed to inject decorrelated light into the optical fiber sample path comprising two decorrelated light signals in orthogonal polarization channels, the sample path being further optically aligned with a collimating lens, a Wollaston prism that produces two beams of decorrelated light, and a focusing lens, wherein the two beams of decorrelated light are collinear and longitudinally displaced relative to each other.
A birefringent optical fiber sample path optically aligned with an optical component disposed to inject decorrelated light into the optical fiber sample path comprising two decorrelated light signals in orthogonal polarization channels, the sample path being further optically aligned with a collimating lens, a Wollaston prism that produces two beams of decorrelated light, and a focusing lens, wherein the two beams of decorrelated light are horizontally separated relative to one another, and the horizontal separation is time dependent.
A birefringent optical fiber reference path optically aligned with an optical component disposed to inject decorrelated light into the optical fiber reference path comprising two decorrelated light signals in orthogonal polarization channels, the optical fiber reference path having an output spliced at 45° to an input of a birefringent fiber of a phase modulator, so that light of both channels of said reference path is equally coupled into the slow axis of said phase modulator input birefringent fiber.
Dependencies are inferred from the claim text.