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Terahertz Time-Domain Spectroscopy Based on Commercially Available 1550 nm Fabry–Perot Laser Diode and ErAs:In(Al)GaAs Photoconductors

Tybussek, Kai-Henning ; Kolpatzeck, Kevin ; Faridi, Fahd Rushd ; Preu, Sascha ; Balzer, Jan C. (2022):
Terahertz Time-Domain Spectroscopy Based on Commercially Available 1550 nm Fabry–Perot Laser Diode and ErAs:In(Al)GaAs Photoconductors. (Publisher's Version)
In: Applied Sciences, 9 (13), MDPI, e-ISSN 2076-3417,
DOI: 10.26083/tuprints-00020606,
[Article]

Abstract

THz time-domain spectroscopy (TDS) is a promising tool for quality control purposes in industrial applications, but the high cost and the relatively large laser sources still make it difficult to use the full potential of the technology for a decent price. In this work, a THz TDS system, which uses a commercially available Fabry–Perot laser diode emitting at 1550 nm, is presented. By dispersion compensation, pulses with a duration of 544 fs were generated, resulting in THz radiation with a bandwidth of 1.4 THz and a peak dynamic range of 56 dB with state-of-the-art ErAs:In(Al)GaAs photoconducting antennas. These results are compared with those of a conventional and expensive fiber laser system with a 90 fs pulse duration.

Item Type: Article
Erschienen: 2022
Creators: Tybussek, Kai-Henning ; Kolpatzeck, Kevin ; Faridi, Fahd Rushd ; Preu, Sascha ; Balzer, Jan C.
Origin: Secondary publication service
Status: Publisher's Version
Title: Terahertz Time-Domain Spectroscopy Based on Commercially Available 1550 nm Fabry–Perot Laser Diode and ErAs:In(Al)GaAs Photoconductors
Language: English
Abstract:

THz time-domain spectroscopy (TDS) is a promising tool for quality control purposes in industrial applications, but the high cost and the relatively large laser sources still make it difficult to use the full potential of the technology for a decent price. In this work, a THz TDS system, which uses a commercially available Fabry–Perot laser diode emitting at 1550 nm, is presented. By dispersion compensation, pulses with a duration of 544 fs were generated, resulting in THz radiation with a bandwidth of 1.4 THz and a peak dynamic range of 56 dB with state-of-the-art ErAs:In(Al)GaAs photoconducting antennas. These results are compared with those of a conventional and expensive fiber laser system with a 90 fs pulse duration.

Journal or Publication Title: Applied Sciences
Journal Volume: 9
Issue Number: 13
Publisher: MDPI
Collation: 9 Seiten
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP)
18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP) > Terahertz Devices and Systems
Date Deposited: 17 Feb 2022 10:41
DOI: 10.26083/tuprints-00020606
URL / URN: https://tuprints.ulb.tu-darmstadt.de/20606
URN: urn:nbn:de:tuda-tuprints-206067
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