Compact and coherent source of widely tunable THz radiation

T. J. Edwards*, D. Walsh, M. B. Spurr, P. G. Browne, C. F. Rae, M. H. Dunn

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)


    We report a THz radiation source based on the technique of non-collinear phasematched parametric generation. The source, which is compact and operable at room temperature, generates nanosecond pulses of peak power and energy greater than 3 W and 17 nJ respectively. The radiation is continuously tunable over the range 1.2-3.05 THz and is of narrow spectral bandwidth (<100 GHz). The use of intersecting pump and parametric wave cavities results in minimum threshold pump pulse energies below 1 mJ (from a Nd:YAG laser excited at 20 W, 500 μsec by a quasi-CW diode-laser) and close to 50% down-conversion efficiency when operated at twice threshold.

    Original languageEnglish
    Article number64020C
    Pages (from-to)1-8
    Number of pages8
    JournalProceedings of SPIE - The International Society for Optical Engineering
    Publication statusPublished - 2006


    • Frequency conversion
    • Nonlinear optics
    • Parametric oscillators and amplifiers
    • Terahertz generation


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