Accession Number : ADD017992
Title : Apparatus and Method for Eliminating Polarization Sensitivity in Transducers.
Descriptive Note : Patent, Filed 3 May 93, patented 27 Feb 96,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Esman, Ronald ; Duling III, Irl N ; Kersey, Alan D
Report Date : Feb 1996
Pagination or Media Count : 7
Abstract : An apparatus and method for converting a signal of arbitrary polarization to one of preselected polarization. e.g. for use by a sensor, transducer, etc. A signal splitter divides the input signal into its orthogonal linearly polarized components, and launches the components from a pair of output ports. The signals counterpropagate to the opposite pun. and, while counterpropagating, are rotated into the same linear polarization state. In one embodiment, the rotation is done by a pair of complementary 45 deg Faraday rotators; in another. by one 90 deg rotator. In the former, the signal is recombined at the splitter in the initial state of polarization that in which the signal initially entered the splitter; in the latter, the recombined signal is of orthoconjugate polarization to the input signal.
Descriptors : *POLARIZATION, *OPTICAL CIRCUITS, *PATENTS, INPUT, SENSITIVITY, TRANSDUCERS, FARADAY EFFECT
Subject Categories : Optics
Electrooptical and Optoelectronic Devices
Distribution Statement : APPROVED FOR PUBLIC RELEASE