Fiber-based source of photon pairs at telecom band with high temporal coherence and brightness for quantum information processing
Xiaoying Li, Lei Yang, Liang Cui, Zhe Yu Ou, Dao-Yin Yu · Optics Letters · 2008
We experimentally demonstrate a bright pulsed source of correlated photon pairs at the 1550 nm telecom band by pumping 300 m dispersion-shifted fiber with a 4 ps pulse train. We investigate the coherence property of the source by measuring the second-order intensity correlation function g(2) of individual signal (idler) photons. A preliminary Hong-Ou-Mandel-type two-photon interference experiment with two such sources confirms the high temporal and spatial coherence of the source. The source is suitable for multiphoton quantum interference of independent sources, which is required in quantum information processing.