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Surface Emitting THz Wave Parametrical Oscillator Using MgO:LiNbO |
| ZHANG Xian-Bin1;SHI Wei1;T. Ikari2;H. Ito2 |
| 1Department of Physics, Xi'an University of Technology, Xi'an 7100482Photo Dynamics Research Center, RIKEN, 519-1399 Aramaki-Aoba, Sendai 980-8577, Japan |
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| Cite this article: |
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ZHANG Xian-Bin, SHI Wei, T. Ikari et al 2007 Chin. Phys. Lett. 24 3153-3156 |
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Abstract Room-temperature operation terahertz (THz) wave source is demonstrated using three MgO:LiNbO3 crystals which have a noncollinear arrangement. The experimental results show that the THz wave can be tunable from 0.8THz to 3.0THz, and the peak energy output is 103pJ/pulse at 1.5THz. The noncollinear cavity configuration makes the THz beam have Gaussian-like spatial distribution, small divergence angle, perpendicularly eradiated from the crystal surface. The beam quality factor M2 is measured to be Mx2=1.15,
Mz2=1.25 for characterizing the THz wave beam. Experiments also show that the THz beam can be focused by using a polyethylene lens, and the focal spot size is close to the diffraction limit.
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| Keywords:
42.65.Yj
42.25.Bs
42.60.Jf
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Received: 24 July 2007
Published: 23 October 2007
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| PACS: |
42.65.Yj
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(Optical parametric oscillators and amplifiers)
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42.25.Bs
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(Wave propagation, transmission and absorption)
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42.60.Jf
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(Beam characteristics: profile, intensity, and power; spatial pattern formation)
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