In these conditions, measurements have been performed in different types of fused silica at 1064 nm and 532 nm. A nonlinear refractive index of 5.2 x 10~(-20) m~2/W has been found at 1064 nm and 3.5 x 10~(-20) m~2/W at 532 nm.Thomas Olivier...
We determine the nonlinear refractive index of fused silica, n(2)(SiO2) = 2.9 x 10(-20) m(2)/W, in agreement with literature values. Subsequent z-scan measurements of single-crystalline gold films reveal a damage threshold of 0.22 TW/cm(2) and approximate upper limits of the real and...
4. This value is substantially smaller than the typically reported values for the nonlinear refractive index of un-irradiated fused silica at 800 nm (2.0–2.5 3 10220 m2/W9,37. This apparently surprising result is perfectly consistent with the observations reported by Blo¨mer and coworkers44 ...
the particle velocity to the phase velocity of the mode is accomplished by fine-tuning the laser’s incidence angle as explained in the Methods section. Sinceσx,y ≫ g, most of the electrons strike the fused silica substrate (with a median energy loss of 290 keV), while 1–2% ...
Single picosecond pulses from a well-calibrated Nd:YAG laser have been used to study the bulk dielectric properties of 14 transparent solids. Measured values of the breakdown thresholds and nonlinear refractive indices are presented. Photomicrographic data of the damage morphology yield information conce...
intensities but has a constant refractive index equivalent to the second material and wherein the second material has a constant refractive index regardless of varying levels of intensity, at intensities lower than a specific minimum threshold, wherein contrast of the image is enhanced by the filter...
2. Nonlinear refractive index n2 of CS2 at different laser intensities, determined using the spectral shearing interferome- try. The line represents the average value of the nonlinear index. Table 1 Nonlinear refractive indices of CS2, toluene and fused silica Material n2 ðm2=WÞ z-scan ...
By means of Z-scan, this paper supplies a description of the sensitive single_beam technique for measuring both the nonlinear refractive index andnonlinear absorption coefficientfor the nonlinear materials. 用Z -扫描技术描述了利用单光束灵敏的测量非线性介质的非线性折射率和非线性吸收系数的方法 ,并给出...
where λ is the wavelength, n2 the nonlinear refractive index of optical materials, I the intensity of the laser beam, z the direction of propagation and L the cumulative length of optical materials along the beamline. Intense efforts have been made to reduce this B-integral; Namely, (i) us...
Kerr-driven nonlinear refractive index of air at 800 and 400nm measured through femtosecond laser pulse filamentation The filamentation dynamics of 15GW femtosecond laser pulses at 800 and 400nm wavelengths upon their tight focusing in air is studied experimentally. The sp... YE Geints,AM Kabanov,...