Optical waveguides – Polarization without modulation
Reexamination Certificate
2005-08-09
2005-08-09
Lee, John D. (Department: 2874)
Optical waveguides
Polarization without modulation
C349S194000
Reexamination Certificate
active
06928200
ABSTRACT:
A method and apparatus that includes a first waveguide segment that differentially changes the amplitude of the light relative to a first polarization orientation, a thickness of oriented liquid crystal or other birefringent material sufficient to delay one polarization component one-half wavelength relative to another, and a second waveguide segment that also differentially changes the amplitude of the light based on the polarization orientation. Also, an apparatus that includes a thin polarization converter that includes a thin first substrate that is substantially transparent to a wavelength of light, and a birefringent material deposited on one or more surfaces of the first substrate and oriented such that the polarization converter forms a half-wavelength birefringent plate for the light. Also, an apparatus having a first substrate surface, a second substrate surface, and a liquid crystal material between the first and second substrate surfaces to form a polarization converter.
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Bhowmik Achintya K.
Fujiyama Takaharu
Liu Connie C.
Sur Biswajit
Takahashi Kenji
Doan Jennifer
Lee John D.
Schwegman Lundberg Woessner & Kluth P.A.
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