Optical: systems and elements – Polarization without modulation – By relatively adjustable superimposed or in series polarizers
Patent
1993-05-03
1996-02-27
Epps, Georgia Y.
Optical: systems and elements
Polarization without modulation
By relatively adjustable superimposed or in series polarizers
359629, G02B 530
Patent
active
054953669
ABSTRACT:
An apparatus and method for converting a signal of arbitrary polarization 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 port, and, while counterpropagating, are rotated into the same linear polarization state. In one embodiment, the rotation is done by a pair of complementary 45.degree. Faraday rotators; in another, by one 90.degree. 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.
REFERENCES:
patent: 4088410 (1978-05-01), Smith
Duling, III Irl N.
Esman Ronald
Kersey Alan D.
Epps Georgia Y.
McDonnell Thomas E.
Miles Edward F.
Robbins Thomas
The United States of America as represented by the Secretary of
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