  Spectrally correlated photon pairs can be used to improve performance of long
range fiber based quantum communication protocols. We present a source based on
spontaneous parametric down-conversion producing polarization entangled photons
without spectral filtering. In addition, the spectral correlation within the
photon pair can be controlled by changing the pump pulse duration or coupled
spatial modes characteristics. The spectral and polarization correlations were
characterized. The generated photon pairs feature both positive spectral
correlations, no correlations, or negative correlations and polarization
entanglement with the fidelity as high as 0.97 (no background subtraction) with
the expected Bell state.
