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Frequency tunability and mode switching of 2.5 THz quantum cascade lasers

Pavlov, Sergey and Hübers, Heinz-Wilhelm and Richter, Heiko and Semenov, Alexey and Tredicucci, Alessandro and Mahler, Lukas and Green, Richard and Beere, Harvey and Ritchie, David (2008) Frequency tunability and mode switching of 2.5 THz quantum cascade lasers. In: Proc. of the 1st International Workshop "THz Radiation: Basic Research and Applications", pp. 24-26. Institute of Electrical and Electronics Engineers. TERA 2008, [2008-10-02 - 2008-10-04], Alushta (Ukraine). ISBN 978-1-4244-2687-4

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Abstract

Spectral characteristics of quantum cascade lasers operating at about 2.5 terahertz have been investigated by means of high-resolution mixing spectroscopy. Linewidth, frequency tunability and frequency stability of the lasers were measured by mixing their radiation with radiation from a 2.5 terahertz gas laser (heterodyne mixing). The results of the homodyne mixing of different modes of the laser indicate on laser mode switching and large variations of the effective refractive index in the active medium caused by the laser drive current.

Item URL in elib:https://elib.dlr.de/55926/
Document Type:Conference or Workshop Item (Speech)
Title:Frequency tunability and mode switching of 2.5 THz quantum cascade lasers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pavlov, SergeyUNSPECIFIEDUNSPECIFIED
Hübers, Heinz-WilhelmUNSPECIFIEDUNSPECIFIED
Richter, HeikoUNSPECIFIEDUNSPECIFIED
Semenov, AlexeyUNSPECIFIEDUNSPECIFIED
Tredicucci, AlessandroNEST CNR-INFM and Scuola Normale Superiore, Pisa, ItalyUNSPECIFIED
Mahler, LukasNEST CNR-INFM and Scuola Normale Superiore, Pisa, ItalyUNSPECIFIED
Green, RichardNEST CNR-INFM and Scuola Normale Superiore, Pisa, ItalyUNSPECIFIED
Beere, HarveyCavendish Laboratory, University of Cambridge, Cambridge, UKUNSPECIFIED
Ritchie, DavidCavendish Laboratory, University of Cambridge, Cambridge, UKUNSPECIFIED
Date:October 2008
Journal or Publication Title:Proc. of the 1st International Workshop "THz Radiation: Basic Research and Applications"
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 24-26
Publisher:Institute of Electrical and Electronics Engineers
ISBN:978-1-4244-2687-4
Status:Published
Keywords:THz cascade lasers, heterodyne mixing, frequency tunability
Event Title:TERA 2008
Event Location:Alushta (Ukraine)
Event Type:international Conference
Event Dates:[2008-10-02 - 2008-10-04]
Organizer:IEEE Lasers and Electro-Optics Society (LEOS)
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 > Terahertz and Infrared Sensors
Deposited By: Pavlov, Dr. Sergey
Deposited On:25 Nov 2008
Last Modified:15 Jan 2010 00:21

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