Microwave Photonic Phase Shifter Based on an Integrated Dual-polarization Dual-parallel Mach-Zehnder Modulator without Optical Filter

ABSTRACT

A frequency-doubled microwave photonic phase shifter (MPPS) without optical filter is proposed. The MPPS is based on an integrated dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM) and a polarization modulator (PolM). The DP-DPMZM with a 90° polarization rotator in one arm is used to generate an optical carrier suppressed double sideband (OCS-DSB) signal with orthogonal polarization, and the PolM with two modes opposite phase modulation is used to introduce the optical phase shift between the two orthogonally polarized tones. Simulations show that the MPPS can realize a continuously tunable phase shift of 360° with only one DC bias voltage, and is not sensitive to the optical carrier wavelength and microwave signal frequency since no optical filter is used.

KEYWORDS:

• Microwave photonics
• microwave photonic phase shifter
• dual-parallel Mach-Zehnder modulator
• polarization modulator

Additional information

Funding

This work was supported in part by the National Natural Science Foundation of China (NSFC, Grant: 61690195) and the Fund of State Key Laboratory of IPOC (IPOC2018ZT09).

Notes on contributors

Zhentao Guo

Zhentao Guo is a master’s degree candidate at Beijing University of Posts and Telecommunications, Beijing, China. Currently, her research focuses on microwave photonic phase shifter.

Jianxin Ma

Jianxin Ma is a professor at Beijing University of Posts and Telecommunications. He received his Ph.D. degree in optical communication from Beijing University of Posts and Telecommunications, Beijing, China, in 2007. He has authored or coauthored more than 50 scientific publications appearing in journals or international conferences. His main research interests include the applications of microwave photonics to telecommunications systems and radio over fiber technologies.

Shanguo Huang

Shanguo Huang is currently a professor in the Key Laboratory of Information Photonics and Optical Communications (IPOC), Ministry of Education, P. R. China, in BUPT. He has published more than 200 SCI/EI search papers and 8 international invited reports in important conferences and journals at home and abroad. His current research interests include the optical networks designing, planning, the traffic control and resource allocation, especially network routing algorithms and performance analysis.

Xinlu Gao

XinLu Gao received her Ph.D. in Physics from Beijing Normal University in 2015. Currently, she is a lecturer at the School of Science, Beijing University of Posts and Telecommunications and her main research directions include RF vortex wave receiving technology based on microwave photonics and the optical true time delay/phase shifter for the optical-controlled RF vortex wave, etc.