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ABSTRACT
In this paper, we propose a microwave photonic phase shifter (MPPS) without optical filtering to generate a frequency octupling microwave photonic (MWP) signal with 360º phase-shifting based on two cascaded Mach–Zehnder modulators (MZMs). Theoretical analysis is given to realize the high-quality frequency octupling MPPS by eliminating the undesired optical carrier and sidebands using an optical coupler (OC). Simulations show that the generated MMW signal has an electrical spurious suppression ratio (ESSR) higher than 33 dB. The impact of the non-ideal modulation index, extinction ratio, and phase drift is discussed and analyzed. Furthermore, the influence of different center frequencies, power, and linewidths of the laser is also analyzed.
Acknowledgments
This work was supported by the Fund of State Key Laboratory of IPOC (IPOC2020ZT06).
Disclosure statement
No potential conflict of interest was reported by the author(s).
Data availability statement
The data presented in this article are publicly available in [GitHub] at [https://github.com/Yingyan1997/ubiquitous-fishstick.git].
Additional information
Notes on contributors
Ying Yan
Ying Yan is a doctor’s degree candidate at Beijing University of Posts and Telecommunications, Beijing, China. Currently, her research focuses on microwave photonic phase shifters.
Jianxin Ma
Jianxin Ma is a professor at the Beijing University of Posts and Telecommunications. He received his Ph.D. in optical communication from the Beijing University of Posts and Telecommunications, Beijing, China, in 2007. He has authored or co-authored more than 50 scientific publications appearing in journals or international conferences. His main research interests include optical communication, microwave photonics to telecommunications systems, and radio over fiber technologies.