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US 10,591,804 B2Granted
Quantum wave-converter
AssigneeLuminit LLC
InventorsJun Ai, Fedor Dimov, Xiaowei Xia, Selim Shahriar, Russell Kurtz, Chris Griffo
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Abstract
A plug-and-play fiber-coupled nonlinear optical quantum wave-converter, optimized for quantum communications, comprises a commercial periodically-poled, waveguide-based, nonlinear optical chip, coupled with a pair of substrate-guided holographic (SGH) wavelength division multiplexers (WDM) and a pair of SGH filters; it offers bidirectional difference frequency conversion (DFG) and sum frequency conversion (SFG) simultaneously in a single packaged device.
Claims8
A secure quantum communications system comprising:
- (a) a first light beam comprising a first wavelength from a first optical source to a first hologram adjacent to one end of a substrate-guided-holographic waveguide;
- (b) a second light beam comprising a second wavelength different than the first wavelength from a second optical source to a second hologram adjacent to an opposite end of the waveguide;
- (c) a third hologram attached to the center of the waveguide;
- wherein the first and second light beams bounce from their respective holograms and travel through the waveguide to combine through a third hologram are focused to a point outside the waveguide;
- wherein the substrate-guided-holographic waveguide comprises a periodically-poled nonlinear optical device;
- wherein the sum frequency generator and difference frequency generator are combined in a single unit;
- wherein at least one of the optical sources comprises a laser;
- and
- wherein the substrate-guided-holographic waveguide comprises a spectral filter with a bandpass comprising a target wavelength so only the target wavelength is output.
6 more elements
Dependencies are inferred from the claim text.