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A compact, continuous-wave terahertz source based on a quantum-cascade laser and a miniature cryocooler

Richter, Heiko and Greiner-Bär, Michael and Pavlov, Sergey and Semenov, Alexei D. and Wienold, Martin and Schrottke, Lutz and Giehler, M. and Hey, R. and Grahn, H. T. and Huebers, H.-W. (2010) A compact, continuous-wave terahertz source based on a quantum-cascade laser and a miniature cryocooler. Optics Express, 18 (10), pp. 10177-10187.

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Abstract

We report on the development of a compact, easy-to-use terahertz radiation source, which combines a quantum cascade laser (QCL) operating at 3.1 THz with a compact, low input-power Stirling cooler. The QCL, which is based on a two miniband design, has been developed for high output and low electrical pump power. The amount of generated heat complies with the nominal cooling capacity of the Stirling cooler of 7 W at 65 K with 240 W of electrical input power. Special care has been taken to achieve a good thermal coupling between the QCL and the cold finger of the cooler. he whole system weighs less than 15 kg including the cooler and power supplies. The maximum output power is 8 mW at 3.1 THz. With an appropriate optical beam shaping, the emission profile of the laser is fundamental Gaussian. The applicability of the system is demonstrated by imaging and molecular-spectroscopy experiments.

Document Type:Article
Title:A compact, continuous-wave terahertz source based on a quantum-cascade laser and a miniature cryocooler
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID
Richter, HeikoHeiko.Richter@dlr.deUNSPECIFIED
Greiner-Bär, Michaelmichael.greiner-baer@dlr.deUNSPECIFIED
Pavlov, SergeySergeij.Pavlov@dlr.deUNSPECIFIED
Semenov, Alexei D.Alexei.Semenov@dlr.deUNSPECIFIED
Wienold, MartinPDIUNSPECIFIED
Schrottke, LutzPDIUNSPECIFIED
Giehler, M.PDIUNSPECIFIED
Hey, R.PDIUNSPECIFIED
Grahn, H. T.PDIUNSPECIFIED
Huebers, H.-W.heinz-wilhelm.huebers@dlr.deUNSPECIFIED
Date:30 April 2010
Journal or Publication Title:Optics Express
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:18
Page Range:pp. 10177-10187
Status:Published
Keywords:Semiconductor lasers, quantum cascade; Laser beam shaping; Infrared, far; Spectroscopy, terahertz
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: Richter, Dr.rer.nat. Heiko
Deposited On:07 Jan 2011 14:49
Last Modified:12 Dec 2013 21:06

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