尾流场是舰船在航行过程中所形成的一个含有大量微气泡而与其他水域所不同的区域，通过对尾流光学特征的研究，提出了一种采用双路锁相放大技术对尾流信号进行检测的方法。该方法利用互相关原理，使输入待测的周期信号与频率相同的参考信号在相关器中实现互相关，从而检测出深埋在噪声中的周期信号携带的信息，为消除激光尾流检测系统中激光器的漂移问题提供了途径，可达到抑制噪声，提高系统检测的灵敏度、可靠性和检测尾流的目的。

There are many micro-bubbles in the zone of ship wake, which makes it different from the normal sea water. A method to detect the signal of ship wake by two-path phase-locking amplification technology is proposed based on the ship wake optical characteristics. Lock-in amplifiers are good at weak signal detection and they are used widely in many areas. By using orthogonal lock-in amplifier technology to eliminate the laser drift of the laser detection system in the process of the ship wake detection, it can reduce the noise and make the detection system more sensitive and reliable.