سال انتشار: ۱۳۸۵

محل انتشار: چهاردهمین کنفرانس مهندسی برق ایران

تعداد صفحات: ۶

نویسنده(ها):

Hassan Kaatuzian – Amir Kabir University of Technology- Tehran- Iran
Ahmad Amjadi – Sharif University of Technology- Tehran-Iran
Hossein Mardanpour – Sharif University of Technology- Tehran-Iran

چکیده:

In this paper, we have focused on breakdown threshold intensity of fast laser pulses interactions with matter. The selected material is water ,since it’s an estimation of eye cornea in laser surgery .For the theoretical analysis we’ve used Quantum-Photonics model in nano-scopic and atomic scales. Simulation contains different time scales. First of all, energy injection during the Laser pulse, second collisions and the final stage is heat diffusion from focal point to neighbor sites. During the simulation, photons are traced down through the different layers of matter. For each layer probability of photon absorption, molecular ionization and molecular dissociation are investigated for different time scales. Results are fairly well comparable with experimental results from other centers. Also Plasma shielding and molecular dissociation have been observed.