Polarization to phase converter
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United States of America Patent
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Nov 29, 2011
Grant Date -
Aug 5, 2004
app pub date -
Apr 10, 2002
filing date -
Apr 11, 2001
priority date (Note) -
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Abstract
The invention provides an apparatus and method for time delaying different polarization components of a signal relative to one another, comprising a polarization signal splitter which splits first and second polarization components of an input signal into a first component signal and a second component signal such that said first component signal propagates along a first path and the second component signal propagates along a second path, wherein said first component signal reaches a location relative to when said second component reaches said location at times differing by a delayed time, and use of the apparatus in a communication system. The apparatus may be used for quantum cryptography, to convert a sender's polarization-qubit signal into a signal appropriate for channels and receivers based on phase-encoded schemes.
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