In this paper, correlated photon pairs at 1.55μm are generated in a silicon wire waveguidewith a length of 1.6 mm. The
ratio between coincidence count rate and accidental coincidence count rate under room temperature is 19, showing the
property of low Raman noise and strong quantum correlation. Moreover, the experiment shows that photon pair
generation isstrongly dependent on pump polarization direction. Using quantum perturbation theory, we analyze the
contribution of scalar and vectorspontaneous four-wave mixing processes to the generated photon pairs. Due tohigh
nonlinear coefficient and high coupling efficiency, the generation rate in quasi-TE mode is much larger than that in
quasi-TM mode.The combination of calculated photon pair generation rates through scalar and vector spontaneous four-wave
mixing processes agrees well with the experimental result.
We realize the correlated photon pair generation at 1.5μm by spontaneous four-wave mixing in high nonlinear
microstructure fibre with a length of 25m, showing that high nonlinear microstructure fibres have great potential in
bright, high efficiency and compact sources of correlated photon pairs at 1.5μm.