[15p-A305-1~11] 3.4 Laser system and materials (formerly 3.5)

[15p-A305-3] Measurement of Two-photon absorption coefficient of Yb³⁺:Sc₂O₃ in 2 µm wavelength

〇Ryohei Mitsui^1,2, Anna Suzuki^1,2, Masaki Tokurakawa^1,2 (1.UEC,ILS, 2.UEC,CNBE)

Keywords:two-photon absorption

We experiments to observation of two-photon stimulated emission, which is the inverse process of two-photon absorption. Two-photon absorption coefficient is one important guide to predict two-photon stimulated emission coefficient.However, The measurement of two-photon absorption coefficient in solid states laser media has not been done very often.Thus, we measure two-photon absorption coefficient of Yb³⁺:Sc₂O₃ by open-aperture Z-scan technique.