Experimental wavelength division multiplexed photon pair distribution
  We have experimentally implemented the distribution of photon pairs produced by spontaneous parametric down conversion through telecom dense wavelength division multiplexing filters. Using the measured counts and coincidences between symmetric channels, we evaluate the maximum fringe visibility that can be obtained with polarization entangled photons and compare different filter technologies. 
Joe Ghalbouni, Imad Agha, Robert Frey, Eleni Diamanti and Isabelle   Zaquine
quant-ph