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符合测量是评价单光子源品质的重要方法,因而符合系统的设计也变得极为重要。详细介绍了符合测量的基本原理和它的数字测量实现方式。针对脉冲边沿触发型的单光子探测器,用FPGA设计实现对两路脉冲的符合计数。由于两路信号路径延迟的不一致性,提出一种整形处理的方法,使这两路信号整形为同时到达信号。并且通过QuartusⅡ调用Model Sim-Altera进行仿真,验证了系统设计的正确性,提高了符合计数器的精度,解决了由于路径延迟而造成的符合计数差错的问题。
Compliance measurement is an important way to evaluate the quality of single-photon sources, and therefore the design of the system becomes very important. Details the basic principle of measurement and its digital measurement implementation. For pulse edge triggered single-photon detectors, using FPGA design to achieve the coincidence count of two pulses. Due to the inconsistency of the delay of the two signal paths, a method of shaping processing is proposed to shape the two signals to arrive at the signals simultaneously. And through the Quartus Ⅱ call Model Sim-Altera simulation, to verify the correctness of the system design, to improve the accuracy of the counter, to solve the problem due to the path delay caused by counting errors.