CMOS-compatible, multiplexed source of heralded photon pairs: towards   integrated quantum combs
  We report an integrated photon pair source based on a CMOS-compatible microring resonator that generates multiple, simultaneous, and independent photon pairs at different wavelengths in a frequency comb compatible with fiber communication wavelength division multiplexing channels (200 GHz channel separation) and with a linewidth that is compatible with quantum memories (110 MHz). It operates in a self-locked pump configuration, avoiding the need for active stabilization, making it extremely robust even at very low power levels. 
Christian Reimer, Lucia Caspani, Matteo Clerici, Marcello Ferrera,   Michael Kues, Marco Peccianti, Alessia Pasquazi, Luca R...
quant-ph