Injection-seeded intracavity terahertz optical parametric oscillator

D. Walsh, D. J. M. Stothard, Tom J Edwards, P. G. Browne, C. E. Rae, M. H. Dunn

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30 Citations (Scopus)


We report a terahertz (THz) source continuously tunable over similar to 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 (C) 2009 Optical Society of America

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


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