Optical communications – Optical repeater system – Regenerative
Reexamination Certificate
2006-07-27
2009-12-29
Phan, Hanh (Department: 2613)
Optical communications
Optical repeater system
Regenerative
C398S152000, C398S065000, C398S175000, C385S122000, C385S129000, C385S147000, C359S332000, C359S326000, C372S021000, C372S022000, C250S216000, C250S225000, C250S214100
Reexamination Certificate
active
07639953
ABSTRACT:
Various embodiments of the present invention are directed to compact systems for generating polarization-entangled photons. In one embodiment of the present invention, a non-degenerate, polarization-entangled photon source comprises a half-wave plate that outputs both a first pump beam and a second pump beam, and a first beam displacer that directs the first pump beam into a first transmission channel and the second pump beam into a second transmission channel. A down-conversion device converts the first pump beam into first signal and idler photons and converts the second pump beam into second signal and idler photons. A second beam displacer directs both the first signal and idler photons and the second signal and idler photons into a single transmission channel. A dichroic mirror directs the first and second signal photons to a first fiber optic coupler and the first and second idler photons to a second fiber optic coupler.
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Beausoliel Raymond G.
Fiorentino Marco
Santori Charles
Spillane Sean
Hewlett--Packard Development Company, L.P.
Phan Hanh
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