  We generate 1550 nm correlated photon pairs through the spontaneous four-wave
mixing (SpFWM) process in a highly nonlinear fiber (HNLF). The pair source
quality generation is evaluated by the coincidence-to-accidental ratio (CAR)
parameter. It is verified that the spontaneous Raman scattering (SpRS) photons
generated inside the fiber contribute to the degradation of the source.
Nevertheless, a CAR value of 2.77 is found for a pump power at the input of the
fiber of 1.1 mW.
