Transmission versus intensity in 100 μm CaF₂ and UV fused silica samples at a wavelength of 473 nm for different durations of the initial pulse was studied. Fitting the experimental data with a model based on the solution of the nonlinear Schrdinger equation and taking into account multiphoton absorption and absorption by the plasma, as well as the Kerr nonlinearity, diffraction and dispersion of the medium, made it possible to obtain the values of multiphoton (k-number of photons) σ_k and plasma absorption (inverse bremsstrahlung) σ cross sections. The obtained values are σ ₄ = 2.5 10⁻¹¹⁷ cm⁸ s³, σ = 3.6 10⁻¹⁸ cm² for CaF₂ and σ ₄ = 4.4 10⁻¹¹⁶ cm⁸ s³, σ = 3 10⁻¹⁸ cm² for UV fused silica.

传输与在100的强度μ中号的CaF ₂和UV熔融二氧化硅样品在用于初始脉冲的不同的持续时间473纳米的波长进行了研究。用基于非线性薛定inger方程解的模型拟合实验数据，并考虑到等离子体对多光子的吸收和吸收，以及介质的Kerr非线性，衍射和色散，使得有可能获得多光子（ķ光子-值）σ _ķ 和等离子体吸收（逆轫致辐射）σ横截面。得到的值是σ ₄ = 2.5 10 ^-117厘米^8个小号³，σ = 3.6 10 ^-18厘米²为的CaF ₂和σ ₄ = 4.4 10 ^-116厘米⁸小号³，σ = 3 10 ^-18厘米²为UV熔融石英。