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Chin. Opt. Lett.
 Home  List of Issues    Issue 04 , Vol. 16 , 2018    10.3788/COL201816.040603

50 GHz optical true time delay beamforming in hybrid optical/mm-wave access networks with multi-core optical fiber distribution
álvaro Morales1, Idelfonso Tafur Monroy1, Fredrik Nordwall2, and Tommi S?rensen3
1 Department of Electrical Engineering, Electro-Optical Communications, [Eindhoven University of Technology], 5600 MB Eindhoven, The Netherlands
2 [Tektronix AB], Kista, Sweden
3 [GoMeasure ApS], Albertslund, Denmark

Chin. Opt. Lett., 2018, 16(04): pp.040603

Topic:Fiber optics and optical communication
Keywords(OCIS Code): 060.4510  060.5625  

We propose and experimentally validate an optical true time delay beamforming scheme with straightforward integration into hybrid optical/millimeter (mm)-wave access networks. In the proposed approach, the most complex functions, including the beamforming network, are implemented in a central office, reducing the complexity and cost of remote antenna units. Different cores in a multi-core fiber are used to distribute the modulated signals to high-speed photodetectors acting as heterodyne mixers. The mm-wave carrier frequency is fixed to 50 GHz (V-Band), thereby imposing a progressive delay between antenna elements of a few picoseconds. That true time delay is achieved with an accuracy lower than 1 ps and low phase noise.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Posted online:2018/3/26

Get Citation: álvaro Morales, Idelfonso Tafur Monroy, Fredrik Nordwall, and Tommi S?rensen, "50 GHz optical true time delay beamforming in hybrid optical/mm-wave access networks with multi-core optical fiber distribution," Chin. Opt. Lett. 16(04), 040603(2018)

Note: This work was partly founded by H2020 ITN CELTA under Grant No. 675683 of Call: H2020-MSCA-ITN-2015. The authors also thank the Technical University of Denmark (DTU) for providing the facilities and the equipment to conduct the experiment.


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