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Proceedings Paper

The art for broad-bandwidth direct third-harmonic generation focusing beams in a single crystal of BBO
Author(s): Keyu Li; Kun Li
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Paper Abstract

By third-order nonlinear coupling and tightly focusing the beams in a single crystal of BBO, high intensity broad-bandwidth femtosecond pulses are used to generate 50μJ of light at 270nm (up to 1% THG efficiency). It is proved that the major contribution to the THG observed is the third-order process, not the cascaded second-order process. And the primary reasons why THG efficiency is about 1% is that 1ωlight is frequency-chirp beams and BBO crystal isn't tuned to optimized angle. At last, the methods to improve the third harmonic conversion efficiency have been put forward.

Paper Details

Date Published: 4 January 2008
PDF: 12 pages
Proc. SPIE 6839, Nonlinear Optics: Technologies and Applications, 68391Q (4 January 2008); doi: 10.1117/12.756758
Show Author Affiliations
Keyu Li, Chinese Academy of Engineering Physics (China)
Kun Li, Sichuan Univ. (China)


Published in SPIE Proceedings Vol. 6839:
Nonlinear Optics: Technologies and Applications
Yiping Cui; Qihuang Gong; Yuen-Ron Shen, Editor(s)

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