Open AccessTHE DAMAGE PHENOMENA ON INFRARED MATERIALS IRRADIATED BY INTENSE PULSED CO2 LASER
Author(s) -
Wang Chun-Kui,
Fang Hui-Ying,
Yongzhong Fu,
Shuying Li,
Li Hui-Ning,
Wu Zhan-Lin,
Shuying Liu,
Hua Mao
Publication year - 1987
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.36.386
Subject(s) - materials science , irradiation , laser , ablation , infrared , shock wave , optics , power density , radiation , shock (circulatory) , radiation damage , optoelectronics , power (physics) , physics , quantum mechanics , aerospace engineering , nuclear physics , thermodynamics , engineering , medicine
Experiments show that the materials damage effects irradiated by intense CO2 laser can be divided into two types: the ablation and shock wave damage. The ablation is dominant when laser power density is lower than air breakdown threshold. When laser power density is higher than berakdown threshold, the shock wave damage becomes prime. Under our experimental condition, when strong laser beam irradiates on brittle targets such as infrared window materials MgF2, KCl, Ge, etc., small cracks or broken pieces are formed very easily. The damage effects are related to pulse energy, power density, pulse width and irradiated area on the target. The photographs of radiation damage are also given.