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A unified system with integrated generation of high-speed communication and high-resolution sensing signals based on THz photonics
KTH, School of Electrical Engineering and Computer Science (EECS), Communication Systems, CoS, Optical Network Laboratory (ON Lab).
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2018 (English)In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 36, no 19, p. 4549-4556, article id 8425966Article in journal (Refereed) Published
Abstract [en]

Multifunctional convergence is one of the key physical features in future generation networks and Internet of things architectures. In this paper, we propose and experimentally demonstrate a unified terahertz (THz) system operating in the 300 GHz band, with a potential of simultaneously enabling high-speed communication and high-resolution ranging over a common optical infrastructure. Both THz communication and THz sensing signals are generated based on THz photonics and cutting-edge terahertz transceiver technologies. In the experiment, 16-quadrature amplitude modulation modulated THz signal is generated by photo-mixing two free running lasers for the communication, and linear frequency modulated (LFM) THz pulses are generated based on optical interferometer-based frequency-to-time mapping (FTM) for sensing. The experimental results show that up to 56 Gbit/s net rate is successfully transmitted over a 2 m free-space line-of-sight link, and the THz LFM pulses with a time-bandwidth product of up to 207 are successfully generated, which is potentially able to enable a cm-scale range resolution. We also investigate the frequency multiplexing schemes for two signals by changing the channel gap at the transmitter side. To the best of our knowledge, such a system represents the first demonstration of integrated generation system in the THz region above 300 GHz, which has great potential in prospective applications of future converged networks. 

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc. , 2018. Vol. 36, no 19, p. 4549-4556, article id 8425966
Keywords [en]
Frequency-to-time mapping, linear frequency modulation, THz communication, THz photonics, Chirp modulation, Frequency modulation, Internet of things, Light modulation, Light polarization, Mapping, Optical fibers, Optical signal processing, Photonics, Optical attenuators, Optical interferometry, THz communications, Optical fiber communication
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-236667DOI: 10.1109/JLT.2018.2863684ISI: 000443892500043Scopus ID: 2-s2.0-85051401362OAI: oai:DiVA.org:kth-236667DiVA, id: diva2:1262789
Note

Export Date: 22 October 2018; Article; CODEN: JLTED; Correspondence Address: Yu, X.; College of Information Science and Electronic Engineering, Zhejiang UniversityChina; email: xyu@zju.edu.cn; Funding details: ZJU, Zhejiang University; Funding details: 2017M611990, China Postdoctoral Science Foundation; Funding details: LZ18F010001, Natural Science Foundation of Zhejiang Province; Funding details: 61771424, NSFC, National Natural Science Foundation of China; Funding text: Manuscript received March 2, 2018; revised May 15, 2018; accepted July 27, 2018. Date of publication August 6, 2018; date of current version August 30, 2018. This work was supported in part by the China Postdoctoral Science Foundation under Grant 2017M611990, in part by the National Natural Science Foundation of China under Grant 61771424, and in part by the Natural Science Foundation of Zhejiang Province under Grant LZ18F010001. (Corresponding authors: Xianbin Yu and Shi Jia.) S. Jia, S. Wang, K. Liu, H. Zhang, X. Jin, S. Zheng, H. Chi, X. Zhang, and X. Yu are with the College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China (e-mail:, jiashizju@zju.edu.cn; wsw@zju.edu.cn; lkx0218@zju.edu.cn; zhanghk@zju.edu.cn; jinxf00@zju. edu.cn; zhengsl@zju.edu.cn; chihao@zju.edu.cn; zhangxm@zju.edu.cn; xyu@ zju.edu.cn). QC 20181113

Available from: 2018-11-13 Created: 2018-11-13 Last updated: 2018-11-13Bibliographically approved

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