We report efficient generation of correlated photon pairs through degenerate four-wave mixing in microstructure fibers. With 735.7 nm pump pulses producing conjugate signal (688.5 nm) and idler (789.8 nm) photons in an 1.8 m microstructure fiber, we detect photon pairs at a rate of 37.6 kHz with a coincidence/accidental contrast of 10:1 in a 0.7 nm collection bandwidth. This is the highest rate reported to date in a fiber-based photon source. The nonclassicality of this source, as defined by the Zou-Wang-Mandel inequality, is violated by 1100 times the uncertainty.
Citation: Physical Review A (Atomic, Molecular and Optical Physics)
Pub Type: Journals
coincidence, four-wave mixing, microstructure fiber, nonclassicality, parametric amplification