G - Physics – 02 – B
Patent
G - Physics
02
B
345/59, 345/60
G02B 5/30 (2006.01) G02B 6/10 (2006.01) G02B 6/28 (2006.01) G02F 1/133 (2006.01) G02F 1/1333 (2006.01)
Patent
CA 1298647
POLARIZING APPARATUS AND METHOD UTILIZING AN OPTICAL FIBER Abstract of the Invention An apparatus selectively transmits light in one of two orthogonal polarizations in an optical fiber. The apparatus has a facing surface formed at one location on the fiber to expose the evanescent field of an optical signal in the fiber. A nematic liquid crystal is placed in contact with the facing surface so that it is in communication with the evanescent field of the optical signal. The nematic crystals have a first orientation state which presents a first refractive index to light traveling in one polarization and a second refractive index to light traveling in the other polarization. The light traveling in one polarization is well guided while the light traveling in the other polarization is radiated at the facing surface. Thus r only light of one polarization continues to propagate through the fiber. The nematic crystals have a second orientation state in which the relative refractive indices for the two polarizations of light are changed so that the polarization which was originally well guided is radiated at the facing surface and the polarization which was originally radiated is well guided. The change in the orientation states of the nematic crystals is accomplished by applying an electric field between two electrodes so that the nematic crystals align themselves with the electric field. UA-46B:cc2/dmw3 022586
530550
Liu Karen
Shaw Herbert J.
Sorin Wayne V.
Board Of Trustees Of The Leland Stanford Junior University (the)
Gowling Lafleur Henderson Llp
Liu Karen
Shaw Herbert J.
Sorin Wayne V.
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