Optical: systems and elements – Polarization without modulation – Polarization using a time invariant electric – magnetic – or...
Reexamination Certificate
2006-07-25
2006-07-25
Dunn, Drew A. (Department: 2872)
Optical: systems and elements
Polarization without modulation
Polarization using a time invariant electric, magnetic, or...
C359S494010, C359S490020, C359S490020, C359S490020
Reexamination Certificate
active
07081996
ABSTRACT:
An isolated polarization beam splitter or combiner, for joining light from different inputs into one common port, and for dividing a beam of light into orthogonal polarizations. In both modes of operation, the splitter/combiner provides isolation preventing transmission of light in a reverse direction. As a splitter, a beam of light is separated through a birefringent material into sub-beams of orthogonal polarization components, and each sub-beam is passed through a non-reciprocal polarization rotator to rotate the polarization so that a reflected beam, or other counter-transmitted light cannot return on the same path through the birefringent material to the source. As a combiner, two separate beams of light are launched with known orthogonal polarizations into a first birefringent material, passed through a non-reciprocal polarization rotator and then combined as orthogonal polarizations into a single output port.
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European Search Report and Annex, No. EP 01 30 6080.
Chang Kok-Wai
Jin Fahong
Wall Pierre D.
Wang Xinglong
Wills Gonzalo
Dunn Drew A.
Hall Vande Sande & Pequignot
JDS Uniphase Corporation
JDS Uniphase Inc.
Pritchett Joshua L.
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