中国物理B ›› 2006, Vol. 15 ›› Issue (10): 2343-2346.doi: 10.1088/1009-1963/15/10/025

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

葛自明1, 蔡君伟1, 敖淑艳1, 罗有华1, 吕志伟2   

  1. (1)East China University of Science and Technology, Department of Physics, Shanghai 200237, China; (2)Institute of Opto-electronics, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2005-11-15 修回日期:2006-06-07 出版日期:2006-10-20 发布日期:2006-10-20
  • 基金资助:
    Project supported by the joint fund of the National Natural Science Foundation of China and the China Academy of Engineering Physics (Grant No 10076004).

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)   

  1. 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
  • Received:2005-11-15 Revised:2006-06-07 Online:2006-10-20 Published:2006-10-20
  • Supported by:
    Project supported by the joint fund of the National Natural Science Foundation of China and the China Academy of Engineering Physics (Grant No 10076004).

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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/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.

关键词: transient longitudinal SBS, damage of the optical glasses, ultrasound wave, intensity of\\hbox{\hskip 1.9cm} acoustic wave

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.

Key words: transient longitudinal SBS, damage of the optical glasses, ultrasound wave, intensity of\\hbox{\hskip 1.9cm} acoustic wave

中图分类号:  (Stimulated Brillouin and Rayleigh scattering)

  • 42.65.Es
42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation) 42.70.Ce (Glasses, quartz) 43.35.Cg (Ultrasonic velocity, dispersion, scattering, diffraction, and Attenuation in solids; elastic constants)