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 a 1.8 m microstructure fiber, we detect photon pairs at a rate of 37.6 kHz with a coincidence/accidental contrast of 10:1 with a full-width-at-half-maximum bandwidth of 0.7 nm. 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.
@article{arxiv.quant-ph/0505211,
title = {Efficient generation of correlated photon pairs in a microstructure fiber},
author = {J. Fan and A. Migdall and L. J. Wang},
journal= {arXiv preprint arXiv:quant-ph/0505211},
year = {2016}
}