The art for broad-bandwidth direct third-harmonic generation focusing beams in a single crystal of BBO

Keyu Li; Kun Li

doi:10.1117/12.756758

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4 January 2008 The art for broad-bandwidth direct third-harmonic generation focusing beams in a single crystal of BBO

Keyu Li, Kun Li

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Proceedings Volume 6839, Nonlinear Optics: Technologies and Applications; 68391Q (2008) https://doi.org/10.1117/12.756758
Event: Photonics Asia 2007, 2007, Beijing, China

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.

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Keyu Li and Kun Li "The art for broad-bandwidth direct third-harmonic generation focusing beams in a single crystal of BBO", Proc. SPIE 6839, Nonlinear Optics: Technologies and Applications, 68391Q (4 January 2008); https://doi.org/10.1117/12.756758

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