Guan-Hua Zuo, Chen Yang, Jun-Xiang Zhao, Zhuang-Zhuang Tian, Shi-Yao Zhu, Yu-Chi Zhang, Tian-Cai Zhang. Generation of bright polarization squeezed light at cesium D2 line based on optical parameter amplifier [J]. Acta Physica Sinica, 2020, 69(1): 014207-1