Compact photonic chip assisted by multi-core fiber for radio beamsteering in 5G

Eduward Tangdiongga, Ailee M. Trinidad, Netsanet Tessema, Maria Morant, Roberto Llorente

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

4 Citations (Scopus)
3 Downloads (Pure)


This paper describes and evaluates experimentally a Si 3 N 4 photonic chip based on optical ring resonators (ORRs) assisted by multi-core fiber (MCF) that enables radio beamsteering in 5G by the continuous tuning of the time delay applied to an antenna array. Each ORR includes two heaters: one for tuning the resonance wavelength and another to set the coupling coefficient. In this way, the configuration for beamsteering can be implemented by heater tuning or by wavelength shifting. Each optical path of the photonic chip comprises a thermally tunable optical side band filter (OSBF) and an ORR in cascade configuration. The output of each optical path is transmitted through a core of a MCF to distribute the modulated 5G signals to each array element at the transmitter antenna. This ensures that all the optical paths have the same length and enables the delay tuning of each array antenna element directly set from the photonic chip. Experimental demonstration is carried out with a four-core MCF with 26 GHz signals suitable for 5G transmission.

Original languageEnglish
Title of host publicationBroadband Access Communication Technologies XIII
EditorsBenjamin B. Dingel, Spiros Mikroulis, Katsutoshi Tsukamoto
Number of pages6
ISBN (Electronic)9781510625327
Publication statusPublished - 1 Jan 2019
EventBroadband Access Communication Technologies XIII 2019 - San Francisco, United States
Duration: 4 Feb 20195 Feb 2019

Publication series

NameProceedings of SPIE


ConferenceBroadband Access Communication Technologies XIII 2019
Country/TerritoryUnited States
CitySan Francisco


  • 5G beamforming
  • integrated photonics
  • multi-core fiber
  • optical ring resonator (ORR)
  • photonic chip
  • radio beamsteering


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