Compact source of continuously and widely-tunable terahertz radiation. | Zendy

Thomas J. Edwards | Zendy; D. Walsh | Zendy; M. B. Spurr | Zendy; Cameron F. Rae | Zendy; M.H. Dunn | Zendy; P. Browne | Zendy

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Compact source of continuously and widely-tunable terahertz radiation.

Author(s) -

Thomas J. Edwards,

D. Walsh,

M. B. Spurr,

Cameron F. Rae,

M.H. Dunn,

P. Browne

Publication year - 2006

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.14.001582

Subject(s) - optics , terahertz radiation , laser , nanosecond , radiation , materials science , optoelectronics , diode , energy conversion efficiency , broadband , bandwidth (computing) , physics , telecommunications , computer science

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 1W and 5 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 threshold pump pulse energies below 1 mJ (from a Nd:YAG laser excited at 20 W, 500 microsec by a quasi-CW diode-laser) and close to 50% down-conversion efficiency when operated at twice threshold.

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