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An efficient wavelength upconversion effect in sapphire driven by microjoule femtosecond laser

Ruihong Dai, Haoyun Zhang,Shiyu Zhu,Fengqiu Wang

2022 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)（2022）

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Abstract
We investigate the nonlinear wavelength conversion processes in sapphire under microjoule femtosecond laser pumping. With appropriate sapphire thickness and focal arrangement, a > 10% wavelength upconversion effect was observed, showing potential use in multi-photon microscopy.
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Key words
Upconversion Efficiency,Pump Laser,Nonlinear Conversion,Focal Length,Nonlinear Optical,Pulse Energy,Spectral Components,Neutral Density Filter,Laser Spot Size,Optical Parametric Oscillator,Spectral Evolution,Upconversion Process
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