OPTIKA ATMOSFERY I OKEANA JOURNAL
V.E. ZUEV INSTITUTE OF ATMOSPHERIC OPTICS
Vol. 24, issue 05, article # 1
Bukin O. A., Bykova E. E., Geints Yu. E., Golik S. S., Zemlyanov A. A., Ilin A. A., Kabanov A. M., Matvienko G. G., Oshlakov V. K., Sokolova E. B. Filamentation of tightly focused ultrashort laser pulse of 800 and 400 nm wavelength. Measurements of nonlinear index of air refraction. // Optika Atmosfery i Okeana. 2011. V. 24. No. 05. P. 351-358 [in Russian].Copy the reference to clipboard
Abstract:
The results of experimental investigations on filamentation dynamics of high-power ultrashort Ti:Sapphire-laser pulses of 800 and 400 nm wavelength at their sharp focusing in air are presented. Dependences of plasma channel position and dimensions, generated in nonlinear beam focus zone on laser pulse power, are obtained. Effective value of nonlinear index of air refraction, related to optical Kerr effect, is determined for two laser wavelengths from processing the dependences in the framework of laser radiation self-focusing theory.
Keywords:
ultrashort laser radiation, filamentation, sharp focusing, plasma channel, Kerr-effect, nonlinear index of refraction