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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 18 — Sep. 15, 2013
  • pp: 3654–3657

Narrow linewidth single-frequency terahertz source based on difference frequency generation of vertical-external-cavity source-emitting lasers in an external resonance cavity

Justin R. Paul, Maik Scheller, Alexandre Laurain, Abram Young, Stephan W. Koch, and Jerome Moloney  »View Author Affiliations


Optics Letters, Vol. 38, Issue 18, pp. 3654-3657 (2013)
http://dx.doi.org/10.1364/OL.38.003654


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Abstract

We demonstrate a continuous wave, single-frequency terahertz (THz) source emitting 1.9 THz. The linewidth is less than 100 kHz and the generated THz output power exceeds 100 μW. The THz source is based on parametric difference frequency generation within a nonlinear crystal located in an optical enhancement cavity. Two single-frequency vertical-external-cavity source-emitting lasers with emission wavelengths spaced by 6.8 nm are phase locked to the external cavity and provide pump photons for the nonlinear downconversion. It is demonstrated that the THz source can be used as a local oscillator to drive a receiver used in astronomy applications.

© 2013 Optical Society of America

OCIS Codes
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(300.6495) Spectroscopy : Spectroscopy, teraherz
(250.5960) Optoelectronics : Semiconductor lasers

ToC Category:
Spectroscopy

History
Original Manuscript: July 16, 2013
Manuscript Accepted: August 9, 2013
Published: September 12, 2013

Citation
Justin R. Paul, Maik Scheller, Alexandre Laurain, Abram Young, Stephan W. Koch, and Jerome Moloney, "Narrow linewidth single-frequency terahertz source based on difference frequency generation of vertical-external-cavity source-emitting lasers in an external resonance cavity," Opt. Lett. 38, 3654-3657 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-18-3654

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