Quantum key distribution with silent active polarization compensation without a reference optical beam
Hua Ren Zhou, Yong Zhu, Jian Wang, Yang Su, Zhiyong Xu, Chuanxin Wu, Jiyong Zhao, Yanbo Wang, He Min, LI Jian-hua, Rong Wang · 2015
The birefringence of fiber quantum channel is compensated for without a reference optical beam always in an interrupt way. We propose and demonstrate a scheme of continuous active polarization compensation based on the feedback of the quantum bit error rate. Two experiments with and without compensation are performed in lab and the records of sifted key rate and quantum bit error rate prove that the scheme is effective.