Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 5, 2010
|
|
---|---|---|
Article Number | 10054 | |
Number of page(s) | 4 | |
DOI | https://doi.org/10.2971/jeos.2010.10054 | |
Published online | 08 November 2010 |
Regular papers
Energy scalable terahertz-wave parametric oscillator using surface-emitted configuration
1
RIKEN Advanced Science Institute, 519-1399, Aramaki Aoba, Aoba-ku, Sendai 980-0845, Japan
2
Graduate School of Engineering, Tohoku University, Sendai 980-8577, Japan
Received:
16
April
2010
We experimentally demonstrated the scalability of the terahertz (THz)-wave parametric oscillator by using a pump beam with a wide aperture and a high pulse energy. THz-wave absorption by the LiNbO3 crystal in the oscillator is substantially suppressed by employing a surface-emitting cavity configuration. We also improved the conversion efficiency by increasing the parametric interaction in the noncollinear phase-matching geometry. A pump depletion of 54% and a conversion efficiency of 0.9 × 10−6 are achieved. A maximum THz output of 382 nJ/pulse was achieved at 1.46 THz using a 8.0 mm-diameter pump beam with a pulse energy of 465 mJ/pulse.
Key words: terahertz-wave / parametric oscillation / surface emission / energy enhancement
© The Author(s) 2010. All rights reserved.
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