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Few-Mode Fibers With Uniform Differential Mode Group Delay for Microwave Photonic Signal Processing

Zhao, Jian, Zhang, Huan, Yang, Zhiqun, Xu, Jinsheng, Xu, Tianhua, Wang, Chao (2020) Few-Mode Fibers With Uniform Differential Mode Group Delay for Microwave Photonic Signal Processing. IEEE Access, 8 . pp. 135176-135183. ISSN 2169-3536. (doi:10.1109/ACCESS.2020.3007169) (KAR id:83059)

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We present a novel design of few-mode fiber (FMF) with a uniform differential mode group delay (U-DMGD) among propagating modes and apply the FMF to a single-fiber delay line module for implementing microwave photonic finite impulse response (FIR) filters. By optimizing key parameters such as the core grading exponent and the dimension of the trench of FMF, a U-DMGD between adjacent modes among four modes (LP 01 , LP 11 , LP 02 and LP 31 ) over the entire C band is achieved. Wavelength dependence is entirely removed. An FIR microwave photonic filter (MPF) implemented using the designed 1-km FMF is investigated through numerical simulations. The free spectral range (FSR) of the MPF is 5.7 GHz, the 3-dB bandwidth is 1.26 GHz, and the main lobe-to-side lobe ratio (MSR) is 10.42 dB. Discussions on fabrication aspects have also been presented. The proposed single-fiber delay line structure based on FMF can significantly reduce the system complexity of microwave photonic signal processing.

Item Type: Article
DOI/Identification number: 10.1109/ACCESS.2020.3007169
Uncontrolled keywords: Few-mode fiber, uniform differential mode group delay (U-DMGD), delay line, microwave photonic filter (MPF)
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Chao Wang
Date Deposited: 21 Sep 2020 14:46 UTC
Last Modified: 16 Feb 2021 14:15 UTC
Resource URI: (The current URI for this page, for reference purposes)
Wang, Chao:
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