Near Infrared Diode Laser THz Systems

Brenner, Carsten; Hu, Yinghui; Gwaro, Jared O.; Surkamp, Nils; Döpke, Benjamin; Hofmann, Martin R.; Kani, Besher; Stöhr, A.; Sumpf, B.; Klehr, A.; Fricke, J.

doi:10.5194/ars-16-167-2018

Cited by 5 publications

(2 citation statements)

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“…Thus, at the receiver, the THz signal is sampled at the difference frequency of the repetition frequencies of the two lasers. This concept was implemented successfully with two MLLD systems [43]. However, the system only provided 0.5 THz of bandwidth and requires further optimization, and, most importantly, it is still rather complex.…”

Section: ) Time Domain Spectroscopy Systemsmentioning

confidence: 99%

Terahertz Sources and Receivers: From the Past to the Future

Makhlouf¹,

Cojocari

Hofmann³

et al. 2023

IEEE J. Microw.

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The rapid progress in semiconductor technology has vastly boosted the development of terahertz sources and receivers in terms of compactness, reliability, operation frequency, and output power. In this manuscript, we report on the latest achievements in terahertz sources and receivers and provide a comprehensive overview of their working principles and applications in THz systems. INDEX TERMS THz technologies, THz photodiodes, THz photoconductors, THz semiconductor laser diodes, THz quantum cascade lasers, THz heterojunction bipolar transistors, THz high electron mobility transistor, THz resonant tunneling diodes, THz Schottky barrier detectors and mixers. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/ SUMER MAKHLOUF received the master's degree in communications engineering from the University of Duisburg-Essen, Duisburg, Germany, in 2018. He is currently working toward the Ph.D. degree in monolithically integrated THz photodiodes with rectangular waveguide outputs for coherent THz receivers. He is currently a Member of the Optoelectronics Department, Center for Semiconductor Technology and Optoelectronics (ZHO) and Research Associate with the University of Duisburg-Essen. Recently, he has been a Senior Engineer with Microwave Photonics GmbH, Oberhausen, Germany, working on developing RF modules for space communications and photonic integrated circuits for ultra-low phase noise THz systems.

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Section: ) Time Domain Spectroscopy Systemsmentioning

confidence: 99%

Terahertz Sources and Receivers: From the Past to the Future

Makhlouf¹,

Cojocari

Hofmann³

et al. 2023

IEEE J. Microw.

Self Cite

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“…Like before, a look-up table might be necessary to perform any kind of THz measurements. For a multimode laser, the output can result in a quasi-pulse like THz trace, where the THz signal is only visible if L matches integer multiples of the cavity roundtrip frequency of the laser (Brenner et al, 2018;Morikawa et al, 1999).…”

Section: Thz Tracesmentioning

confidence: 99%

Y-shaped tunable monolithic dual colour lasers for THz technology

Brenner,

Surkamp,

Hofmann

2023

Adv. Radio Sci.

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Abstract. THz generation by difference frequency generation can be accomplished by many different laser systems. The most cost efficient and compact solution will be monolithic dual-colour lasers. Application of these lasers in THz metrology can suffer from several drawbacks like coupling between the modes, strong amplitude variations, low tuning capabilities, or a complicated growth process. We discuss the impact of these points for THz measurements and present a simple monolithic dual colour laser which can be used for material characterisations.

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