An Investigation of the Optical-and-Thermophysical and Gasdynamic Characteristics of Femtosecond Laser Ablation of Structural Materials of the Polymer Series

摘要

A description is made of the experimental-diagnostic module with femtosecond terawatt laser complex (τ_(0.5) ～ 45-70 fs, λ = 266, 400, and 800 nm) and of the pioneering procedure of combined ultrahigh-speed interferometry and interference microscopy (Michelson and Mach-Zehnder schemes) of the processes of interaction between ultrashort laser pulses and condensed media in vacuum. Results are given for the first time of the investigation of spectral-energy thresholds and rates of laser ablation of a number of solid-state media using elements of the polymer series (C_2F_4)_n, (CH_2O)_n in the UV-NIR wavelength range of laser radiation in atmospheric conditions and in vacuum p ～ 10~(-2) Pa.