Title :
Influence of Power Distribution on Performance of Intermodulation Distortion Suppression
Author :
Dong Liang ; Qinggui Tan ; Wei Jiang ; Zhongbo Zhu ; Xiaojun Li ; Zhoushi Yao
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Space Microwave, China Acad. of Space Technol.-Xi´an, Xi´an, China
Abstract :
A linearized analog photonic link based on a dual parallel Mach-Zehnder modulator (MZM) and an unsymmetrical power divider is proposed and demonstrated. By adjusting power distribution ratio of radio frequency signals, the third-order intermodulation distortion (IMD3) of two submodulators balances each other. Influence of power distribution ratio on the performance of IMD3 suppression is evaluated in experiment. When the power distribution ratio is 0.1, IMD3 suppression can achieve to ~ 62.1 dB according to the experimental results. Spurious-free dynamic range is improved by 23 dB in a 1-Hz bandwidth comparing with the scheme based on a single MZM. Experiment results are in good agreement with the theoretical analysis.
Keywords :
intermodulation distortion; optical communication equipment; optical links; optical modulation; power distribution; power dividers; IMD3; MZM; bandwidth 1 Hz; dual parallel Mach-Zehnder modulator; intermodulation distortion suppression; linearized analog photonic link; power distribution; power distribution ratio; radio frequency signals; spurious-free dynamic range; submodulators; third-order intermodulation distortion; unsymmetrical power divider; Microwave photonics; Modulation; Optical fibers; Power distribution; Power dividers; Analog photonic link; Dual Parallel Mach–Zehnder Modulator; IMD3; dual parallel Mach???Zehnder modulator; linearized; unsymmetrical power divider;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2433015
