  Optical communication systems are able to send the information from one user
to another in light beams that travel through the free space or optical fibers,
therefore how to send larger amounts of information in smaller periods of time
is a long term concern, one promising way is to use multiplexing of photon's
different degrees of freedoms to parallel handle the large amounts of
information in multiple channels independently. In this work, by combining the
wavelength and time division multiplexing technologies, we prepare a
multifrequency mode time bin entangled photon pair source at different time
slots by using four wave mixing in a silicon nanowire waveguide, and distribute
entangled photons into 3 time by 14 wavelength channels independently, which
can significantly increase the bit rate compared with the single channel
systems in quantum communication. Our work paves a new and promising way to
achieve a high capacity quantum communication and to generate a multiple photon
nonclassical state.
