The damage of the optical components induced by the stimulated Brillouin scattering

• 来源期刊: 中国物理（英文版）
• 关键词: transient longitudinal SBS damage of the optical glasses ultrasound wave intensity of acoustic wave
• 年，卷（期）: 2006,（10）
• 页码范围: 2343-2346
• 页数: 4页
• 语种: 英文

摘要

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.