The damage of the optical components induced by the stimulated Brillouin scattering
Ge Zi-Ming(葛自明)a)†, Lü Zhi-Wei(吕志伟)b), Cai Jun-Wei(蔡君伟)a), Ao Shu-Yan(敖淑艳)a), and Luo You-Hua(罗有华)a)
a East China University of Science and Technology, Department of Physics, Shanghai 200237, China; b Institute of Opto-electronics, Harbin Institute of Technology, Harbin 150001, China
Abstract A theory of excitation of ultrasonic waves in the stimulated Brillouin scattering (SBS) process is presented in this paper. By using several reasonable approximations, a numerical calculation of the transient longitudinal SBS shows that large amplitude of acoustic waves can be built up by the nanosecond pulse of high-power laser, which may result in the damage of optical glasses. The maximal density change and the maximal acoustic wave intensity in optical glasses of 5 cm in thickness are calculated by using different parameters of the high-energy laser, such as the intensity, the pulse width, and the wave length. The damage threshold of the optical glasses is about 80 GW/cm2 when using a 1064 nm laser. The dynamic mechanism of SBS is the electrostriction effect of the components coupling with the high-power laser.
Received: 15 November 2005
Revised: 07 June 2006
Accepted manuscript online:
(Ultrasonic velocity, dispersion, scattering, diffraction, and Attenuation in solids; elastic constants)
Fund: Project supported by the
joint fund of the National Natural Science Foundation of China and the
China Academy of Engineering
Physics (Grant No 10076004).
Cite this article:
Ge Zi-Ming(葛自明), Lü Zhi-Wei(吕志伟), Cai Jun-Wei(蔡君伟), Ao Shu-Yan(敖淑艳), and Luo You-Hua(罗有华) The damage of the optical components induced by the stimulated Brillouin scattering 2006 Chinese Physics 15 2343
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