title: Tunable 360° photonic radio frequency phase shifter based on optical quadrature double-sideband modulation and differential detection.
abstract: We propose a novel structure of a photonic RF phase shifter based on the vector-sum principle. The optical signal with quadrature double-sideband modulation passes through a dual-output Mach-Zehnder interferometer (MZI), and the two outputs are differentially detected. Two phase-quadrature RF terms are generated, and their amplitudes can be controlled in a triangularly complementary way by changing the phase of the MZI. A full tuning range of 0°-360° at 14 GHz is demonstrated experimentally accompanied by nearly constant RF amplitude. The validity of using our scheme in all-optical RF phase modulation is also verified.
authors.affiliation: State Key Laboratory on Integrated Optoelectronics/Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China. xxx03@mails.tsinghua.edu.cn
authors.forename: Xiaoxiao
authors.initials: X
authors.lastname: Xue
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Zheng
authors.forename: Hanyi
authors.initials: H
authors.lastname: Zhang
authors.forename: Bingkun
authors.initials: B
authors.lastname: Zhou