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Few-mode fibers with uniform differential mode group delay for microwave photonic signal processing

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Zhao, Jian, Zhang, Huan, Yang, Zhiqun, Xu, Jinsheng, Xu, Tianhua and Wang, Chao (2020) Few-mode fibers with uniform differential mode group delay for microwave photonic signal processing. IEEE Access, 8 . pp. 135176-135183. doi:10.1109/ACCESS.2020.3007169

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Official URL: http://dx.doi.org/10.1109/ACCESS.2020.3007169

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Abstract

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: Journal Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Optical fiber communication, Fiber optics, Microwave filters, Delay lines, Microwave devices
Journal or Publication Title: IEEE Access
Publisher: IEEE
ISSN: 2169-3536
Official Date: 6 July 2020
Dates:
DateEvent
6 July 2020Published
30 June 2020Available
Date of first compliant deposit: 3 December 2020
Volume: 8
Page Range: pp. 135176-135183
DOI: 10.1109/ACCESS.2020.3007169
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
61775165[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
61975248[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
EP/S005625/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266

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