Line-narrowed, compact, and coherent source of widely tunable terahertz radiation

D. J M Stothard, T. J. Edwards, D. Walsh, C. L. Thomson, C. F. Rae, M. H. Dunn, P. G. Browne

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


We report a technique for line-narrowing terahertz radiation produced through parametric generation. By incorporating an etalon within the idler-wave cavity of the parametric oscillator, radiation is generated with a linewidth of 1 GHz (freerunning linewidth 50-100 GHz) and with a center frequency continuously tunable over a band >50 GHz, settable anywhere within the coarse tuning range of the device (1-3 THz). When implemented within an intracavity cavity geometry, pulses of terahertz radiation of duration ∼10 ns and energy ∼30 nJ are generated at repetition rates up to 400 Hz (implying mean powers of >10 μW and peak powers of ∼3 W) in a compact device.

Original languageEnglish
Article number141105
Pages (from-to)141105-1-141105-3
Number of pages3
JournalApplied Physics Letters
Issue number14
Publication statusPublished - 2008

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