Single-laser polarization-controlled optical sampling system for THz- TDS

Kolano, M.; Boidol, Oliver; Weber, Stefan; Molter, Daniel; Freymann, Georg von

doi:10.1109/irmmw-thz.2018.8509880

Cited by 2 publications

(2 citation statements)

References 18 publications

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“…Polarization capabilities: Using two polarizations (horizontal and vertical) with sophisticated algorithms of crosspolarization cancellation is promising to boost the Terahertz system performance toward higher throughput and lower total system signal to interference ratio [266]. The main challenges with the dual-polarization approach from the MAC point of view are to balance the traffic between the two polarizations and to mitigate errors.…”

Section: General Challenges and Future Research Directionsmentioning

confidence: 99%

MAC Protocols for Terahertz Communication: A Comprehensive Survey

Ghafoor

Boujnah

Rehmani

et al. 2020

IEEE Commun. Surv. Tutorials

107

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Terahertz communication is emerging as a future technology to support Terabits per second link with highlighting features as high throughput and negligible latency. However, the unique features of the Terahertz band such as high path loss, scattering, and reflection pose new challenges and results in short communication distance. The antenna directionality, in turn, is required to enhance the communication distance and to overcome the high path loss. However, these features in combine negate the use of traditional medium access protocols (MAC). Therefore, novel MAC protocol designs are required to fully exploit their potential benefits including efficient channel access, control message exchange, link establishment, mobility management, and line-of-sight blockage mitigation. An in-depth survey of Terahertz MAC protocols is presented in this paper. The paper highlights the key features of the Terahertz band which should be considered while designing an efficient Terahertz MAC protocol, and the decisions which if taken at Terahertz MAC layer can enhance the network performance. Different Terahertz applications at macro and nano scales are highlighted with design requirements for their MAC protocols. The MAC protocol design issues and considerations are highlighted. Further, the existing MAC protocols are also classified based on network topology, channel access mechanisms, and link establishment strategies as Transmitter and Receiver initiated communication. Open challenges and future research directions on Terahertz MAC protocols are also highlighted. Index Terms-Terahertz band, terahertz communication network, terahertz technology, terahertz physical layer, terahertz MAC layer, terahertz channel model, terahertz propagation model, terahertz antenna, terahertz transceivers. I. INTRODUCTION T HE DEMAND for wireless data traffic has increased significantly since the evolution of Internet and Mobile Technology and is projected to exceed Petabytes by 2021 [1].

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Section: General Challenges and Future Research Directionsmentioning

confidence: 99%

MAC Protocols for Terahertz Communication: A Comprehensive Survey

Ghafoor

Boujnah

Rehmani

et al. 2020

IEEE Commun. Surv. Tutorials

107

View full text Add to dashboard Cite

show abstract

“…For example, several groups have proposed methods to eliminate the need for a mechanical ODU. These include asynchronous optical sampling (ASOPS) [ 6 , 7 , 8 ], electrically controlled optical sampling (ECOPS) [ 9 ], optical sampling by cavity tuning (OSCAT) [ 10 , 11 ], and single-laser polarization-controlled optical sampling (SLAPCOPS) [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Ultra-High Repetition Rate Terahertz Time-Domain Spectroscopy for Micrometer Layer Thickness Measurement

Kolpatzeck

Liu

Haring

et al. 2021

Sensors

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Terahertz time-domain spectroscopy systems driven by monolithic mode-locked laser diodes (MLLDs) exhibit bandwidths exceeding 1 THz and a peak dynamic range that can compete with other state-of-the-art systems. Their main difference compared to fiber-laser-driven systems is their ultra-high repetition rate of typically dozens of GHz. This makes them interesting for applications where the length of the terahertz path may not be precisely known and it enables the use of a very short and potentially fast optical delay unit. However, the phase accuracy of the system is limited by the accuracy with which the delay axes of subsequent measurements are synchronized. In this work, we utilize an all-fiber approach that uses the optical signal from the MLLD in a Mach–Zehnder interferometer to generate a reference signal that we use to synchronize the detected terahertz signals. We demonstrate transmission-mode thickness measurements of stacked layers of 17μm thick low-density polyethylene (LDPE) films.

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Single-laser polarization-controlled optical sampling system for THz- TDS

Cited by 2 publications

References 18 publications

MAC Protocols for Terahertz Communication: A Comprehensive Survey

MAC Protocols for Terahertz Communication: A Comprehensive Survey

Ultra-High Repetition Rate Terahertz Time-Domain Spectroscopy for Micrometer Layer Thickness Measurement

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