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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 10 — May. 10, 2010
  • pp: 10177–10187

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

H. Richter, M. Greiner-Bär, S. G. Pavlov, A. D. Semenov, M. Wienold, L. Schrottke, M. Giehler, R. Hey, H. T. Grahn, and H.-W. Hübers  »View Author Affiliations


Optics Express, Vol. 18, Issue 10, pp. 10177-10187 (2010)
http://dx.doi.org/10.1364/OE.18.010177


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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. The 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.

© 2010 OSA

OCIS Codes
(140.3300) Lasers and laser optics : Laser beam shaping
(260.3090) Physical optics : Infrared, far
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: January 25, 2010
Revised Manuscript: April 1, 2010
Manuscript Accepted: April 1, 2010
Published: April 30, 2010

Citation
H. Richter, M. Greiner-Bär, S. G. Pavlov, A. D. Semenov, M. Wienold, L. Schrottke, M. Giehler, R. Hey, H. T. Grahn, and H.-W. Hübers, "A compact, continuous-wave terahertz source based on a quantum-cascade laser and a miniature cryocooler," Opt. Express 18, 10177-10187 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-10-10177


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