[CThA1E] Wavelength Conversion and Laser Devices

[CThA1E-03] An efficient wavelength upconversion effect in sapphire driven by microjoule femtosecond laser

Ruihong Dai¹, Haoyun Zhang¹, Shiyu Zhu¹, *Fengqiu Wang¹ (1. Nanjing University (China))

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 for multi-photon microscopy.