The damage of the optical components induced by the stimulated Brillouin scattering |
| |
Authors: | Ge Zi-Ming Lii Zhi-Wei Cai Jun-Wei Ao Shu-Yan Luo You-nua |
| |
Institution: | East China University of Science and Technology, Department of Physics, Shanghai 200237, China; 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/cm^{2} when using a 1064 nm laser. The
dynamic mechanism of SBS is the electrostriction effect of the components
coupling with the high-power laser. |
| |
Keywords: | transient longitudinal SBS damage of the optical glasses ultrasound wave intensity of hbox{\hskip 1 9cm} acoustic wave |
本文献已被 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|