Injection-seeded intracavity terahertz optical parametric oscillator

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

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    28 Citations (Scopus)


    We report a terahertz (THz) source continuously tunable over ̃20 GHz with a linewidth <100 MHz (close to the transform limit of 1-10 ns pulses) and settable anywhere in the range of 1-3 THz. The source consists of an injection-seeded intracavity THz optical parametric oscillator, which exhibits the benefits of lower threshold and enhanced efficiency and power over a similar extracavity device. Linewidth control was achieved with <1 mW of seed laser power and THz pulse energies of >5 nJ observed with up to 68% downconversion of the pump wave. Spectroscopy of the 1.4969 THz carbon monoxide absorption line was performed to verify linewidth and demonstrate tuning capability.

    Original languageEnglish
    Pages (from-to)1196-1202
    Number of pages7
    JournalJournal of the Optical Society of America B: Optical Physics
    Issue number6
    Publication statusPublished - 1 Jun 2009


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