Generation of time-bin entangled photons without temporal post-selection
  We report on the implementation of a new interferometric scheme that allows the generation of photon pairs entangled in the time-energy degree of freedom. This scheme does not require any kind of temporal post-selection on the generated pairs and can be used even with lasers with short coherence time. 
Alessandro Rossi, Giuseppe Vallone, Francesco De Martini, Paolo   Mataloni