Effect of intensity clamping on laser ablation by intense femtosecond laser pulses.
We have experimentally demonstrated that because of intensity clamping, when the laser peak power is higher than the critical power for self-focusing, further increase of the laser power cannot result in corresponding increase of the laser ablation rate of a metallic sample placed in gases. The ablation rate will finally approach a stabilized value. Also, the experimental technique implemented in our work could be potentially used to measure the self-focusing critical power and the nonlinear refractive index.
Institute of Modern Optics, Nankai University, Key Laboratory of Opto-electronic Information Science and Technology, Education Ministry of China, Tianjin 300071, China.
Z J
ZJ
Xu
W
W
Liu
N
N
Zhang
M W
MW
Wang
X N
XN
Zhu
D003198:Computer Simulation; D004307:Dose-Response Relationship, Radiation; D053685:Laser Therapy / Q000379:methods*; D008962:Models, Theoretical; D011829:Radiation Dosage; D012815:Signal Processing, Computer-Assisted