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

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

Keyu Li, Kun Li

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.

Citation Download Citation

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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