Tunable compact entangled-photon source and QKD system using...

Details Tunable compact entangled-photon source and QKD system using... Tunable compact entangled-photon source and QKD system using...

2007-07-27

2010-12-28

Petkovsek, Daniel (Department: 2874)

Optical: systems and elements

Optical frequency converter

Dielectric optical waveguide type

C359S328000, C359S330000, C372S022000, C372S102000, C372S105000, C385S037000

Reexamination Certificate

active

07859744

ABSTRACT:
A robust, quickly tunable narrow-linewidth entangled photon source system based on Spontaneous Parametric Down Conversion (SPDC) of the pump light in periodically polled LiNbO3(PPLN) waveguides. The photon source provides narrow-linewidth, entangled output photons having a wavelength in the telecom C-Band wavelength. To tailor the output spectrum of the output photons, the PPLN waveguide is arranged between two end waveguides having LiNbO3-embedded Bragg gratings, thereby forming a tunable Fabry-Perot cavity. The resulting narrow output linewidth of the output photons makes the system desirable for use in a long-distance quantum key distribution (QKD) system.

REFERENCES:
patent: 6356674 (2002-03-01), Davis et al.
patent: 7142572 (2006-11-01), Tojo
patent: 7386021 (2008-06-01), Kashyap
patent: 7791790 (2010-09-01), Furuya et al.
patent: 2003/0179787 (2003-09-01), Woodley
patent: 2006/0274401 (2006-12-01), Inoue

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