Bipartite polarization entangled optical fields are theoretically analyzed and experimentally prepared. When the analysis frequency is 1.8-6.5 MHz, the normalized quantum correlation noise of Stokes operator is below 1, where the bipartite polarization entangled state is obtained. When the analysis frequency is above 3 MHz, the correlation noise reaches 0.5. This non-classical light source can be applied in quantum memory in future and to realizing the entanglement and quantum state transfer between the quantum channel and quantum node or between two quantum nodes.