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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 25 — Dec. 7, 2009
  • pp: 22303–22310

Continuous-wave optical parametric terahertz source

Rosita Sowade, Ingo Breunig, Iván Cámara Mayorga, Jens Kiessling, Cristian Tulea, Volkmar Dierolf, and Karsten Buse  »View Author Affiliations


Optics Express, Vol. 17, Issue 25, pp. 22303-22310 (2009)
http://dx.doi.org/10.1364/OE.17.022303


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Abstract

Here, we present a continuous-wave optical parametric terahertz light source that does not require cooling. It coherently emits a diffraction-limited terahertz beam that is tunable from 1.3 to 1.7 THz with power levels exceeding 1 µW. Simultaneous phase matching of two nonlinear processes within one periodically-poled lithium niobate crystal, situated in an optical resonator, is employed: The signal wave of a primary parametric process is enhanced in this resonator. Therefore, its power is sufficient for starting a second process, generating a backwards traveling terahertz wave. Such a scheme of cascaded processes increases the output power of a terahertz system by more than one order of magnitude compared with non-resonant difference frequency generation due to high intracavity powers. The existence of linearly polarized terahertz radiation at 1.35 THz is confirmed by analyzing the terahertz light with metal grid polarizers and a Fabry-Pérot interferometer.

© 2009 Optical Society of America

OCIS Codes
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(260.3090) Physical optics : Infrared, far
(040.2235) Detectors : Far infrared or terahertz
(230.7405) Optical devices : Wavelength conversion devices

ToC Category:
Nonlinear Optics

History
Original Manuscript: October 29, 2009
Revised Manuscript: November 17, 2009
Manuscript Accepted: November 20, 2009
Published: November 23, 2009

Citation
Rosita Sowade, Ingo Breunig, Iván Cámara Mayorga, Jens Kiessling, Cristian Tulea, Volkmar Dierolf, and Karsten Buse, "Continuous-wave optical parametric terahertz source," Opt. Express 17, 22303-22310 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-25-22303


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