Abstract
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 language | English |
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Title of host publication | Broadband Access Communication Technologies XIII |
Editors | Benjamin B. Dingel, Spiros Mikroulis, Katsutoshi Tsukamoto |
Publisher | SPIE |
Number of pages | 6 |
ISBN (Electronic) | 9781510625327 |
DOIs | |
Publication status | Published - 1 Jan 2019 |
Event | Broadband Access Communication Technologies XIII 2019 - San Francisco, United States Duration: 4 Feb 2019 → 5 Feb 2019 |
Publication series
Name | Proceedings of SPIE |
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Volume | 10945 |
Conference
Conference | Broadband Access Communication Technologies XIII 2019 |
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Country/Territory | United States |
City | San Francisco |
Period | 4/02/19 → 5/02/19 |
Funding
This research was supported by Spain National Plan MINECO/FEDER UE TEC2015-70858-C2-1-R XCORE, GVA AICO/2018/324 NXTIC and Dutch FreeBEAM projects. M. Morant work supported by Spain Juan de la Cierva IJCI-2016-27578 grant and Fundación BBVA Leonardo HYPERCONN project. A. Trinidad work supported by Dutch NWO Zwaartekracht Integrated Nanophotonics.
Keywords
- 5G beamforming
- integrated photonics
- multi-core fiber
- optical ring resonator (ORR)
- photonic chip
- radio beamsteering