• Bright polarization-entangled photon pairs source 

• Pair spectrum centered at 1320 nm 

• Spectral width of 100 nm 

• High polarization-entanglement visibility 

• High brightness 

• Minimum dispersion in G652/G657 fibers

Applications: Quantum key distribution, quantum metrology, absorption spectroscopy, 2-photon interference, subshot-noise imaging, random number generation, clock synchronization, ghost imaging, entanglement swapping.

2 General Description This photon pair source generates polarization-entangled photons at 1320 nm via spontaneous parametric downconversion in a PPKTP crystal. The down-conversion process is driven with the integrated 660 nm pump laser achieving a photon pair rate >500 000 pairs/s and a photon-heralding probability of >30%. The spectrally nondegenerate photons in each pair are separated with a wavelength-division multiplexer. The visibility >96% of the polarization-entangled photons makes it an ideal photon-pair source for quantum optics applications.