Femtosecond Laser--Pumped Source of Entangled Photons for Quantum Cryptography Applications

Conference · Tue Jul 31 00:00:00 EDT 2007 · Photon Counting Application, Quantum Optics, and Quantum Cryptography (SPIE, Bellingham, WA)

OSTI ID:910451

Pan, D; Donaldson, W; Sobolewski, R

We present an experimental setup for generation of entangled-photon pairs via spontaneous parametric down-conversion, based on the femtosecond-pulsed laser. Our entangled-photon source utilizes a 76-MHz-repetition-rate, 100-fs-pulse-width, mode-locked, ultrafast femtosecond laser, which can produce, on average, more photon pairs than a cw laser of an equal pump power. The resulting entangled pairs are counted by a pair of high-quantum-efficiency, single-photon, silicon avalanche photodiodes. Our apparatus is intended as an efficient source/receiver system for the quantum communications and quantum cryptography applications.

• Research Organization: Univ. of Rochester, NY (United States). Lab. for Laser Energetics
• Sponsoring Organization: USDOE
• DOE Contract Number: FC52-92SF19460
• OSTI ID: 910451
• Report Number(s): DOE/SF/194060-765; 2007-46; 1733; TRN: US0704240
• Journal Information: Photon Counting Application, Quantum Optics, and Quantum Cryptography (SPIE, Bellingham, WA), Vol. 6583; Conference: SPIE Europe: Optics and Optoelectronics, Prague, Czech Republic, 16-19 April 2007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMMUNICATIONS
LASERS
OPTICS
PHOTODIODES
PHOTONS
QUANTUM CRYPTOGRAPHY
SILICON
spontaneous parametric down-conversion
photon entanglement
type-II BBO crystal
femtosecond lasers
quantum cryptography
single-photon detectors