Wireless Data Transmission Method Using Pulsed THz Sliced Spectral Supercontinuum

Grachev, Yaroslav V.; Liu, Xinrui; Putilin, S. É.; Tsypkin, A. N.; Bespalov, V. G.; Kozlov, S. A.; Zhang, X.-C.

doi:10.1109/lpt.2017.2777338

Cited by 21 publications

(16 citation statements)

References 30 publications

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“…THz pulses, in turn, propagated in a hollow metal waveguide chirping and interfering. The presence of the chirp enables to observe not only the formation of a quasi-discrete spectrum 24 , but also the formation of a train of pulses during the interference 26,27 . This is possible due to the correct selection of conditions, namely, a small delay between pulses and the presence of a chirp with a known dependence.…”

Section: Resultsmentioning

confidence: 99%

Formation of gigahertz pulse train by chirped terahertz pulses interference

Liu

Melnik

Oparin

et al. 2020

Sci Rep

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The state-of-art broadband THz sources can contribute to the development of short-range 6G communications. this paper has demonstrated the feasibility of forming the controllable sequence of tHz subpulses in the temporal domain and the corresponding quasidiscrete spectrum by the interference of two tHz pulses with an exponential chirp. Moreover, due to small time delay between these pulses the temporal and spectral structures are similar to each other (so-called "linkage relation"). This will benefit information encoding in the THz range. The calculated metrics for the prototype communication channel based on the proposed method are competitive with existing short-range tHz cW channels. The maturity and commercialization of the fifth generation (5G) has already arrived 1. 6G (6th generation wireless systems)-a technology that supposed 100 to 1000 times 2,3 faster than 5G, is considered to come to our lives in the next ten years 4. Fresh spectral bands as well as advanced physical layer solutions are required for future wireless communications and THz wireless technology is a potential candidate 5-9. Usually optical frequency combs are used in IR optical communication systems providing high data rates for long distances 10. In this case, a large number of channels can be created using spectrum-sliced supercontinuum (SSSC) by arranging the interference of the two pulses with ultra-broadband spectra 11,12. In the THz range a typical method to generate THz spectral comb is THz generator pumped by a pulse train of fs laser pulses 13. It has also been reported that the transmitted spectrum of a THz pulse through a multilayer filter could achieve sub-comb structure 14. As a THz frequency comb, it can be used to measure the frequency of a continuous-wave THz with high precision 15 ; is suitable for the source of THz wireless communication of wavelength division multiplexing 16 , and expected to be used in ultra-fast information transmission systems 17. The use of pulsed THz sources is limited by strong free space losses due to the wide spectrum which does not overlap with atmospheric transparency window 18. Therefore, THz links have been suggested to use pulsed sources for short distance indoor communications 19,20 , and to use continuous radiation sources for long distances 21,22. The implementation of these techniques relies on ultra-fast modulation as well as encoding and decoding methods of THz wave, in which pulsed broadband THz technologies can make contributions 23. In the case of pulsed broadband radiation, the main aim is to create encoding methods based on wavelength division multiplexing (WDM). For instance, quasi-discrete THz supercontinuum, obtained via spectral interference of two THz pulses, can be used to achieve a data transfer rate of 34.1 Gb/s with 31 THz spectral lines 24. In the NIR region, the profiling of the spectral structure and the corresponding pulse sequence with a THz repetition rate has been verified both experimentally and analytically 25-27. The peculiarity of this approach lies in the fa...

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Section: Resultsmentioning

confidence: 99%

Formation of gigahertz pulse train by chirped terahertz pulses interference

Liu

Melnik

Oparin

et al. 2020

Sci Rep

Self Cite

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“…Earlier, similar combs were reported, and they were obtained using the overlap of the two THz pulses shifted in time. 5 It is proposed that one can create a frequency comb for data transfer, where the channel width is set by the delay between pulses. In the case of flat wave fronts, it is uniform in space.…”

Section: Properties Of Multiplexed Signalsmentioning

confidence: 99%

“…A further increase in the carrier frequency and the bandwidth with radiophysical methods is complicated, and therefore, for development of wireless communication systems, it is reasonable to go up in frequency in the THz band. Both continuous 3 and pulsed 4,5 THz radiation that possesses a ultrabroad spectral bandwidth for even higher capacity are considered for these tasks.…”

Section: Introductionmentioning

confidence: 99%

Propagation dynamics of ultrabroadband terahertz beams with orbital angular momentum for wireless data transfer

Kulya

Sokolenko

Gorodetsky

et al. 2020

Broadband Access Communication Technologies XIV

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“…Terahertz (THz) technology is now standing at the lab doorstep to real world applications. The THz spectral band of electromagnetic waves has found a wide range of perspective applications for spectroscopy 1 , 2 , microscopy 3 , 4 , terahertz medical sensing 5 , 6 , security imaging 7 , 8 , detection of dangerous or illicit substances 8 – 10 and ultrafast data transfer 11 – 13 . However, the widespread use of THz technologies is hampered by the absence of effective, compact and energy efficient THz sources operating at room temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…Since the generated signal is a short single pulse hundreds of fs in duration, its spectrum spreads over several octaves in THz frequency range. The broad bandwidth is ideal for spectroscopic investigations of organic molecules 16 , material science 1 , 17 , 18 as well as wireless THz transmitters and receivers 13 . However, conventional THz PCAs have a rather low conversion efficiency that prevents data transmission over long distances, they do not provide a large signal-to-noise ratio, and require ultrafast laser pump at wavelengths around λ = 800 nm, usually provided by expensive and bulky Ti:Sapphire lasers 19 .…”

Section: Introductionmentioning

confidence: 99%

Boosting Terahertz Photoconductive Antenna Performance with Optimised Plasmonic Nanostructures

Lepeshov

Gorodetsky

Krasnok

et al. 2018

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Advanced nanophotonics penetrates into other areas of science and technology, ranging from applied physics to biology, which results in many fascinating cross-disciplinary applications. It has been recently demonstrated that suitably engineered light-matter interactions at the nanoscale can overcome the limitations of today’s terahertz (THz) photoconductive antennas, making them one step closer to many practical implications. Here, we push forward this concept by comprehensive numerical optimization and experimental investigation of a log-periodic THz photoconductive antenna coupled to a silver nanoantenna array. We shed light on the operation principles of the resulting hybrid THz antenna, providing an approach to boost its performance. By tailoring the size of silver nanoantennas and their arrangement, we obtain an enhancement of optical-to-THz conversion efficiency 2-fold larger compared with previously reported results for similar structures, and the strongest enhancement is around 1 THz, a frequency range barely achievable by other compact THz sources. We also propose a cost-effective fabrication procedure to realize such hybrid THz antennas with optimized plasmonic nanostructures via thermal dewetting process, which does not require any post processing and makes the proposed solution very attractive for applications.

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Wireless Data Transmission Method Using Pulsed THz Sliced Spectral Supercontinuum

Cited by 21 publications

References 30 publications

Formation of gigahertz pulse train by chirped terahertz pulses interference

Formation of gigahertz pulse train by chirped terahertz pulses interference

Propagation dynamics of ultrabroadband terahertz beams with orbital angular momentum for wireless data transfer

Boosting Terahertz Photoconductive Antenna Performance with Optimised Plasmonic Nanostructures

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