High-Purity Telecom-Band Entangled Photon-Pairs via Four-Wave Mixing in Dispersion-Shifted Fiber
Kim Fook Lee, Jun Chen, Chuang Liang, Xiaoying Li, Paul L. Voss, Prem Kumar · Frontiers in Optics · 2005
We have studied the purity of entangled photon-pairs generated in a dispersion- shifted fiber at various temperatures. Two-photon interference with visibility > 98% is observed at 77K, without subtraction of the background Raman photons.