High Linearity Microwave Photonic Up-Conversion System Based on Parallel Dual-Drive Mach–Zehnder Modulators

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...

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Bibliographic Details
Published in:Photonics 2022-04, Vol.9 (4), p.236
Main Authors: Wang, Weiheng, Bai, Yu, Fu, Shuanglin, Su, Xinxin, Gu, Yiying, Chi, Hao, Zhao, Mingshan, Han, Xiuyou
Format: Article
Language:English
Subjects:
Broadband
frequency conversion
Intermediate frequencies
Intermodulation
Mach-Zehnder interferometers
Microwave photonics
Modulators
Optics
Optimization
spurious-free dynamic range
Upconversion
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Summary: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.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics9040236