An investigation of the optical-and-thermophysical and gasdynamic characteristics of femtosecond laser ablation of structural materials of the polymer series

Abstract

A description is made of the experimental-diagnostic module with femtosecond terawatt laser complex (τ0.5 ∼ 45–70 fs, λ = 266, 400, and 800 nm) and of the pioneering procedure of combined ultrahighspeed 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 solidstate media using elements of the polymer series (C2F4) n , (CH2O) n in the UV-NIR wavelength range of laser radiation in atmospheric conditions and in vacuum p ∼ 10−2 Pa.