为了实现水下激光距离选通成像系统中激光脉冲与像增强型CCD之间的高精度同步控制，提高图像分辨率，提出了一种基于现场可编程门阵列水下激光成像系统的同步控制器。控制器利用现场可编程门阵列的高集成度和灵活性，用锁相环作为全局时钟，用进位链作延时单元，使门控脉冲的延时和门宽精度达亚纳秒级，解决了常规控制电路由于分离元件所带来的延时精度低，不稳定的问题。结果表明,这种同步控制器可解决门控成像系统的精确定时问题，能满足稳定、实时应用的要求。

A synchronization controller based on field programmable gate array (FPGA) for an underwater laser imaging system was proposed to realize the synchronization of the pulsed laser and the intensified CCD(ICCD) and improve the image resolution. The controller, taking the advantages of FPGA’s high compact and flexibility, uses the phase-locking-loop for the global clock frequency and the carry chain for delay cell so that the precision of pulse delay and pulse width gets up to a nanosecond level. Problems with the precision and stabilization induced by discrete components in conventional control circuits were solved. Experimental results indicate that synchronization controller is a feasible solution for gated imaging system working under tight time and visibility requirements of stability and real-time applications.