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- Title
High Linearity Microwave Photonic Up-Conversion System Based on Parallel Dual-Drive Mach–Zehnder Modulators.
- Authors
Wang, Weiheng; Bai, Yu; Fu, Shuanglin; Su, Xinxin; Gu, Yiying; Chi, Hao; Zhao, Mingshan; Han, Xiuyou
- Abstract
A large dynamic frequency up-conversion scheme based on parallel dual-drive Mach–Zehnder modulators (DD-MZM) and balance detection is proposed and demonstrated experimentally. By optimizing the distribution ratio of the optical carrier power and the IF signal power between the two DD-MZMs, the third-order intermodulation components in two sub-links cancel each other upon the balanced photodetector. The measured results show that the large spurious-free dynamic range of 112.3 dB·Hz4/5 is obtained for an intermediate frequency signal of 2 GHz up-converted to 18 GHz, which is a 14.8 dB enhancement compared with the traditional carrier suppression double-sideband modulation mixer. The frequency up-conversion performance of the established system for the broadband signal is measured with the results demonstrating the feasibility of the proposed optimization scheme.
- Subjects
MICROWAVES; MICROWAVE photonics; INTERMODULATION; PHOTODETECTORS
- Publication
Photonics, 2022, Vol 9, Issue 4, pN.PAG
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics9040236