Terahertz (THz) wireless systems for space applications

Hwu, Shian U.; Desilva, Kanishka; Jih, Cindy T.

doi:10.1109/sas.2013.6493580

Cited by 61 publications

(28 citation statements)

References 17 publications

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“…Every year the interest in the terahertz (THz) frequency range is stimulated by the new ideas on its various applications. In addition to the common use in medicine, national security and imaging, radiation at these frequencies fits for wireless space systems [1,2]. Thus, the natural issue is to create economical and sufficiently powerful THz source for this purposes.…”

Section: Introductionmentioning

confidence: 99%

Double-pump technique – one step closer towards efficient liquid-based THz sources

Ponomareva¹,

Tcypkin²,

Smirnov³

et al. 2019

Opt. Express

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By irradiating a water jet with double pulses, we demonstrate 4-fold higher THz wave generation than for a single pump pulse. The dependence of the enhanced THz signal on the temporal delay between two collinear pulses reveals the optimal time for launching signal pulse is near 2-4 ps, which corresponds to the time needed to create the complete pre-ionization state when sufficient electron density is already induced, and there is no plasma reflection of the pump pulse radiation. The increase in THz waves generation efficiency corresponds to the case of water jet excitation by the pulses with an optimal duration for a certain jet thickness, which is determined by the spatial pulse size. Using a theoretical model of the interaction of a high-intensity sub-picosecond pulse with an isotropic medium, we held a numerical simulation, which well describes the experimental results when using 3 ps value of population relaxation time. Thus, in this work, double pump method allows not only to increase the energy of the generated THz waves, but also to determine the characteristic excited state lifetime of liquid water. The optical-to-terahertz conversion efficiency in case of double pulse excitation of water column is of the order of 0.5·10 −3 , which exceeds the typical values for THz waves generation during two-color filamentation in air and comparable with the achievable values due to the optical rectification in some crystals.

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Section: Introductionmentioning

confidence: 99%

Double-pump technique – one step closer towards efficient liquid-based THz sources

Ponomareva¹,

Tcypkin²,

Smirnov³

et al. 2019

Opt. Express

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show abstract

“…Similar to most other performance-driven applications, space-based terahertz communications typically require maximized performance metrics [102,103]. Specifications such as antenna gain, component bandwidth, linearity, noise, data rate, and reliability are critically important in space applications.…”

Section: Space-based Terahertz Systemsmentioning

confidence: 99%

A Perspective on Terahertz Next-Generation Wireless Communications

et al. 2019

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In the past year, fifth-generation (5G) wireless technology has seen dramatic growth, spurred on by the continuing demand for faster data communications with lower latency. At the same time, many researchers argue that 5G will be inadequate in a short time, given the explosive growth of machine connectivity, such as the Internet-of-Things (IoT). This has prompted many to question what comes after 5G. The obvious answer is sixth-generation (6G), however, the substance of 6G is still very much undefined, leaving much to the imagination in terms of real-world implementation. What is clear, however, is that the next generation will likely involve the use of terahertz frequency (0.1–10 THz) electromagnetic waves. Here, we review recent research in terahertz wireless communications and technology, focusing on three broad topic classes: the terahertz channel, terahertz devices, and space-based terahertz system considerations. In all of these, we describe the nature of the research, the specific challenges involved, and current research findings. We conclude by providing a brief perspective on the path forward.

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“…Radio astronomy and wireless communication are also fields with great interest in this spectral range. For example, terahertz waves could be used to detect cold bodies and debris in space or to increase data transmission using the larger bandwidth of the terahertz band [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

3D Printed Hollow-Core Terahertz Fibers

Cruz

Cordeiro

Franco

2018

Fibers

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This paper reviews the subject of 3D printed hollow-core fibers for the propagation of terahertz (THz) waves. Several hollow and microstructured core fibers have been proposed in the literature as candidates for low-loss terahertz guidance. In this review, we focus on 3D printed hollow-core fibers with designs that cannot be easily created by conventional fiber fabrication techniques. We first review the fibers according to their guiding mechanism: photonic bandgap, antiresonant effect, and Bragg effect. We then present the modeling, fabrication, and characterization of a 3D printed Bragg and two antiresonant fibers, highlighting the advantages of using 3D printers as a path to make the fabrication of complex 3D fiber structures fast and cost-effective.

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Terahertz (THz) wireless systems for space applications

Cited by 61 publications

References 17 publications

Double-pump technique – one step closer towards efficient liquid-based THz sources

Double-pump technique – one step closer towards efficient liquid-based THz sources

A Perspective on Terahertz Next-Generation Wireless Communications

3D Printed Hollow-Core Terahertz Fibers

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