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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 15 — Jul. 29, 2013
  • pp: 17647–17658

Observation of a cascaded process in intracavity terahertz optical parametric oscillators based on lithium niobate

C. L. Thomson and M. H. Dunn  »View Author Affiliations

Optics Express, Vol. 21, Issue 15, pp. 17647-17658 (2013)

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Cascaded difference frequency generation has been observed in intracavity optical parametric oscillators based on bulk lithium niobate and producing nanosecond pulses of terahertz radiation. Two idler waves are generated, namely: the primary idler wave associated with the parametric down conversion process itself; and a secondary idler wave, due to difference frequency generation. Experimental investigations of the frequency, temporal evolution, propagation direction, intensity, phase matching and oscillation threshold of the generated down-converted waves are reported. The overall generation efficiency for the terahertz radiation is enhanced, thereby overcoming the Manley-Rowe limit. Advantages of the present approach over schemes based on periodically poled lithium niobate are identified.

© 2013 OSA

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(190.0190) Nonlinear optics : Nonlinear optics
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers

ToC Category:
Nonlinear Optics

Original Manuscript: June 10, 2013
Revised Manuscript: July 6, 2013
Manuscript Accepted: July 8, 2013
Published: July 16, 2013

C. L. Thomson and M. H. Dunn, "Observation of a cascaded process in intracavity terahertz optical parametric oscillators based on lithium niobate," Opt. Express 21, 17647-17658 (2013)

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