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

C. L. Thomson*, M. H. Dunn

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)
3 Downloads (Pure)

Abstract

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.

Original languageEnglish
Pages (from-to)17647-17658
Number of pages12
JournalOptics Express
Volume21
Issue number15
DOIs
Publication statusPublished - 29 Jul 2013

Keywords

  • Cascaded difference frequency generation
  • Intracavity optical parametric oscillators
  • Lithium niobate
  • Terahertz radiation
  • Idler waves
  • Manley-Rowe limit

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