Saturable absorption coefficient (β) and the three-photon absorption coefficient (γ).

Laser intensity (GW cm−1)	7.8	16.0	28.6	54.8	97.1
β (cm GW−1)	−4.47 × 102	−5.85 × 102	−4.32 × 10−3	−1.05 × 10−5	−7.89 × 10−10
γ (cm3 GW−2)	9.97 × 10−9	3.08 × 10−9	1.64 × 10−4	3.72 × 10−3	15.8