title: Experimental demonstration of polarization encoding quantum key distribution system based on intrinsically stable polarization-modulated units.
abstract: A proof-of-principle demonstration of a one-way polarization encoding quantum key distribution (QKD) system is demonstrated. This approach can automatically compensate for birefringence and phase drift. This is achieved by constructing intrinsically stable polarization-modulated units (PMUs) to perform the encoding and decoding, which can be used with four-state protocol, six-state protocol, and the measurement-device-independent (MDI) scheme. A polarization extinction ratio of about 30 dB was maintained for several hours over a 50 km optical fiber without any adjustments to our setup, which evidences its potential for use in practical applications.
authors.forename: Jindong
authors.initials: J
authors.lastname: Wang
authors.forename: Xiaojuan
authors.initials: X
authors.lastname: Qin
authors.forename: Yinzhu
authors.initials: Y
authors.lastname: Jiang
authors.forename: Xiaojing
authors.initials: X
authors.lastname: Wang
authors.forename: Liwei
authors.initials: L
authors.lastname: Chen
authors.forename: Feng
authors.initials: F
authors.lastname: Zhao
authors.forename: Zhengjun
authors.initials: Z
authors.lastname: Wei
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Zhang