THz Communications using Photonics and Electronic Devices: the Race to Data-Rate

Ducournau, Guillaume; Szriftgiser, Pascal; Pavanello, Fabio; Peytavit, E.; Zaknoune, M.; Bacquet, Denis; Beck, Alexandre; Akalin, T.; Lampin, Jean‐François

doi:10.1007/s10762-014-0112-x

Cited by 80 publications

(33 citation statements)

References 47 publications

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“…A promising technology to generate such carriers is optical heterodyning [32,33]. In this approach a dual-wavelength laser source is combined with a high-speed photodiode, typically a uni-travelling-carrier photodiode (UTC-PD).…”

Section: Nm Distributed Feedback Dual Wavelength Laser Sources Fmentioning

confidence: 99%

III-V-on-Silicon Photonic Devices for Optical Communication and Sensing

et al. 2015

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Section: Nm Distributed Feedback Dual Wavelength Laser Sources Fmentioning

confidence: 99%

III-V-on-Silicon Photonic Devices for Optical Communication and Sensing

et al. 2015

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“…One particular application where dispersion control may rapidly become critical is in the point-to-point distribution of ultra-high definition (UHD) and 3-D video 22 . For UHD video, uncompressed (real-time) data rates of up to 25 Gbps (giga bits per second) are required.…”

Section: Introductionmentioning

confidence: 99%

Compensating Atmospheric Channel Dispersion for Terahertz Wireless Communication

Strecker

Ekin

O’Hara

2020

Sci Rep

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We report and demonstrate for the first time a method to compensate atmospheric group velocity dispersion of terahertz pulses. In ultra-wideband or impulse radio terahertz wireless communication, the atmosphere reshapes terahertz pulses via group velocity dispersion, a result of the frequency-dependent refractivity of air. Without correction, this can significantly degrade the achievable data transmission rate. We present a method for compensating the atmospheric dispersion of terahertz pulses using a cohort of stratified media reflectors. Using this method, we compensated group velocity dispersion in the 0.2-0.3 THz channel under common atmospheric conditions. Based on analytic and numerical simulations, the method can exhibit an in-band power efficiency of greater than 98% and dispersion compensation up to 99% of ideal. Simulations were validated by experimental measurements. 3/9

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“…Benefiting from the breakthrough of ultrafast lasers and semiconductors in recent decades, the understanding of THz frequency has been dramatically deepened especially in its source and detection. Bright prospects in myriad aspects such as imaging [1], communication [2], and sensing [3] have been revealed, thus attracting increasing research efforts. Considering many basic functional devices in other wave bands cannot be well transplanted to the THz regime, tunable devices operating in the THz regime and preferably working at room temperature are still urgently desired.…”

Section: Introductionmentioning

confidence: 99%

Optically Controlled Extraordinary Terahertz Transmission of Bi2Se3 Film Modulator

Zhou

Yang

et al. 2019

Photonic Sens

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Standing on the potential for high-speed modulation and switching in the terahertz (THz) regime, all-optical approaches whose response speeds mainly depend on the lifetime of nonequilibrium free carriers have attracted a tremendous attention. Here, we establish a novel bi-direction THz modulation experiment controlled by femtosecond laser for new functional devices. Specifically, time-resolved transmission measurements are conducted on a series of thin layers Bi 2 Se 3 films fabricated straightforwardly on Al 2 O 3 substrates, with the pump fluence range from 25 μJ/cm 2 to 200 μJ/cm 2 per pulse. After photoexcitation, an ultrafast switching of THz wave with a full recovery time of ~10 ps is observed. For a longer timescale, a photoinduced increase in the transmitted THz amplitude is found in the 8 and 10 quintuple layers (QL) Bi 2 Se 3 , which shows a thickness-dependent topological phase transition. Additionally, the broadband modulation effect of the 8 QL Bi 2 Se 3 film is presented at the time delays of 2.2 ps and 12.5 ps which have a maximum modulation depth of 6.4% and 1.3% under the pump fluence of 200 μJ/cm 2 , respectively. Furthermore, the absorption of α optical phonon at 1.9 THz shows a time-dependent evolution which is consistent with the cooling of lattice temperature.

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THz Communications using Photonics and Electronic Devices: the Race to Data-Rate

Cited by 80 publications

References 47 publications

III-V-on-Silicon Photonic Devices for Optical Communication and Sensing

III-V-on-Silicon Photonic Devices for Optical Communication and Sensing

Compensating Atmospheric Channel Dispersion for Terahertz Wireless Communication

Optically Controlled Extraordinary Terahertz Transmission of Bi2Se3 Film Modulator

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