Collinear source of polarization-entangled photon pairs at nondegenerate wavelengths

2008/04/23 by Pavel Trojek, Harald Weinfurter · 4 citations
Chemistry · Computer Science · Engineering · Physics and Astronomy · #Chemistry #Laser #Mechanical and Optical Resonators #Optics #Optoelectronics #Photon #Photon entanglement #Photonic and Optical Devices #Physics #Polarization (electrochemistry) #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #Single-photon source #Wavelength #quant-ph

paper · pdf · doi:10.1063/1.2924280

4 pages, 4 figures, accepted in Applied Physics Letters

arxiv created 2008/04/23 · openalex publication_date 2008/05/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We report on a simple but highly efficient source of polarization-entangled photon pairs at nondegenerate wavelengths. The fully collinear configuration of the source enables very high coupling efficiency into a single optical mode and allows the use of long nonlinear crystals. With optimized dispersion compensation, it is possible to use a free-running laser diode as pump source and to reach an entanglement fidelity of 99.4% at rates as high as 27000pairs∕s∕mW of pump power.

Citations

• Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels
• New High-Intensity Source of Polarization-Entangled Photon Pairs
• Quantum cryptography based on Bell’s theorem
• Experimental Test of Local Hidden-Variable Theories
• Optimal focusing for maximal collection of entangled narrow-band photon pairs into single-mode fibers
• Ultrabright source of polarization-entangled photons

Cited by

• Optimizing type-I polarization-entangled photons
• High fidelity field stop collection for polarization-entangled photon pair sources
• Event-Ready Bell Test Using Entangled Atoms Simultaneously Closing Detection and Locality Loopholes
• Experimental characterization of three-wave mixing in a multimode nonlinear KTiOPO4 waveguide

Related

• Compact Polarization-Entangled Photon Source Based on Coexisting Noncritically Birefringent and Quasi Phase Matching in a Nonlinear Crystal
• Ultrabright Sagnac-type source of non-degenerate polarization-entangled photon pairs using only off-the-shelf optical components
• Direct Polarization-Entangled Photon Pair Generation Using Domain-Engineered Nonlinear Crystals
• New High-Intensity Source of Polarization-Entangled Photon Pairs
• Polarization Entanglement with highly non-degenerate photon pairs enhanced by effective walk-off compensation method