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4 January 2008 The art for broad-bandwidth direct third-harmonic generation focusing beams in a single crystal of BBO
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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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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