应用焦区受激布里渊散射特性探测水下物体

为了实现对水下物体的实时监测,提出采用焦区受激布里渊散射方法直接探测水下物体.通过理论模拟给出在一定焦距下Stokes光能量随探测物体距离信号消失的位置及泵浦光与Stokes光的时间间隔随物体距离的变化关系.运用调QNd:YAG激光器基频光倍频后的输出波长为532nm,脉宽为10ns的脉冲激光进行了焦区内水下物体的探测实验.实验结果表明,当物体在焦斑前时探测误差最小,在188cm探测范围内,探测误差均小于4%.

Applying stimulated Brillouin scattering properties in the focusing regime to the detection of submerged objects

This paper presents a method for real-time detection of submerged objects based on stimulated Brillouin scattering(SBS) properties in the focusing regime.The relationship between reflected energy and the location of the object in an SBS cell was introduced.The location where the Stokes signal disappeared was decided by stimulating.The delay time between the echo signal and the pump signal can give the location of a submerged object.Using input a laser with a 532 nm wavelength and 10 ns pulse duration,genera...