Laser Physics Letters ( IF 1.4 ) Pub Date : 2021-02-02 , DOI: 10.1088/1612-202x/abdcc0 Ya V Grudtsyn 1 , A V Koribut 1 , A A Rogashevskii 1 , Yu A Gerasimova 1 , V A Trofimov 2 , V I Yalovoi 1 , S L Semjonov 3
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) σk 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.
中文翻译:
CaF 2和紫外熔融石英在473 nm下的多光子和等离子体吸收测量
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。