Abstract In this paper, we experimentally perform the measurement of the backscattered light intensity from the underwater targets with different size. We develop a simple system, which can easily measure the intensity of the backscattered light, after the laser is scattered at the target underwater. We find that, the signal period is related to the particle size, and the stability of the intensity (standard deviation) varies linearly with changing the particle size. After the calibration, our system can be used to precisely determine the particle size of arbitrary targets. Our method could open a new opportunity for the future underwater detection using femtosecond pulse laser.

中文翻译：

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使用飞秒脉冲激光器测量来自水下目标的背向散射光的强度

摘要 在本文中，我们通过实验对不同尺寸的水下目标的背向散射光强度进行了测量。我们开发了一个简单的系统，可以在激光在水下目标处散射后轻松测量背向散射光的强度。我们发现，信号周期与粒径有关，强度的稳定性（标准偏差）随粒径的变化呈线性变化。校准后，我们​​的系统可用于精确确定任意目标的粒度。我们的方法可以为未来使用飞秒脉冲激光的水下探测开辟新的机会。