  Biphoton frequency comb (BFC) having quantum entanglement in a high
dimensional system is widely applicable to quantum communication and quantum
computation. However, a dozen mode realized so far has not been enough to
realize its full potential. Here, we show a massive-mode BFC with polarization
entanglement experimentally realized by a nonlinear optical waveguide
resonator. The generated BFC at least 1400 modes is broad and dense, that
strongly enhances the advantage of BFC. We also demonstrated a versatile
property of the present BFC, which enables us to prepare both the
frequency-multiplexed entangled photon pair and the high dimensional
hyperentangled one. The versatile, stable and highly efficient system with the
massive-mode BFC will open up a large-scale photonic quantum information
platform.
