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Laser Local Oscillators for Heterodyne Receivers beyond 2 Terahertz

Hübers, Heinz-Wilhelm and Richter, Heiko and Pavlov, Sergey and Semenov, Alexei and Tredicucci, Alessandro and Mahler, Lucas and Beere, Harvey and Ritchie, David (2008) Laser Local Oscillators for Heterodyne Receivers beyond 2 Terahertz. Frequenz, Journal of RF-Engineering and Telecommunications, 62 (5-6), pp. 111-117. Schiele&Schön. ISSN 0016-1136

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Abstract

The design and performance of a local oscillator (LO) for an airborne terahertz heterodyne receiver is reported. The LO is based on a THz gas laser, which is transversely excited by radiation from a CO<sub>2</sub> pump laser. Frequency stabilization is achieved by cascaded locking loop. where the frequency of the CO<sub>2</sub> laser is stabilized to a Fabry-Perot interferometer, which in turn is stabilized to a HeNe laser. The LO is compact and mechanically rugged in order to comply with the harsh environment on board of an aircraft. It also fulfills all physical requirements with respect to output power, beam profile and frequency stability. A THzquantum cascade laser (QCL) is a potential alternative to a gas laser LO. We report on the performance of a 2.5-THz QCL with respect to beam profile, frequency tuning behaviour and width of its emission line. The QCL has been used as LO to pump a hot electron bolometric mixer at 2.5 THz.

Item URL in elib:https://elib.dlr.de/56024/
Document Type:Article
Title:Laser Local Oscillators for Heterodyne Receivers beyond 2 Terahertz
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hübers, Heinz-WilhelmUNSPECIFIEDUNSPECIFIED
Richter, HeikoUNSPECIFIEDUNSPECIFIED
Pavlov, SergeyUNSPECIFIEDUNSPECIFIED
Semenov, AlexeiUNSPECIFIEDUNSPECIFIED
Tredicucci, AlessandroScuola Normale Superiore and NEST-INFM, Pisa/ItalyUNSPECIFIED
Mahler, LucasScuola Normale Superiore and NEST-INFM, Pisa/ItalyUNSPECIFIED
Beere, HarveyUniversity of Southampton/ GBUNSPECIFIED
Ritchie, DavidUniversity of Southampton/ GBUNSPECIFIED
Date:June 2008
Journal or Publication Title:Frequenz, Journal of RF-Engineering and Telecommunications
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:62
Page Range:pp. 111-117
Editors:
EditorsEmail
Technical University of Braunschweig, Institute of High Frequency TechnologyUNSPECIFIED
Publisher:Schiele&Schön
Series Name:Journal of RF-Engineering and Telecommunications
ISSN:0016-1136
Status:Published
Keywords:terahertz, gas laser, quantum cascade laser, local oscillator, heterodyne receiver
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Projekt SOFIA (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Hübers, Dr. Heinz-Wilhelm
Deposited On:01 Dec 2008
Last Modified:27 Apr 2009 15:27

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