通过具体的地面模拟实验对应用在空间目标探测中的单光子探测器(SPAD)进行了定标。在空间目标探测中,考虑到与红外被动探测复用,所选取的SPAD的单光子雪崩二极管(APD)为InGaAs-APD;由于目标信息(比如距离)的不确定性,所使用的SPAD的外围抑制模式采用了主动抑制技术;对工作模式,雪崩电压,反偏电压和倍增因子,量子效率,暗计数,死时间几个方面进行了简单的介绍,建立了探测器响应接收能量的计数性能曲线,最后证实了其探测灵敏度是单光子水平的。结果表明,将目前广泛用于量子通信中的SPAD尝试用于空间目标探测中是具有可行性和有意义的。 The calibration of a single photon detector (SPAD) used in the space target detection was performed through the specific ground simulation experiments. In spatial target detection, the single photon avalanche diode (APD) of the selected SPAD is InGaAs-APD, taking into account multiplexing with infrared passive detection. Due to the uncertainty of the target information (such as distance), the periphery of the used SPAD The suppression mode adopts the active suppression technology. The operating modes, avalanche voltage, reverse bias voltage and multiplication factor, quantum efficiency, dark counting and dead time are briefly introduced. The counting performance curve of detector receiving energy is established , Finally confirmed its detection sensitivity is single-photon level. The results show that it is feasible and meaningful to use SPAD, which is widely used in quantum communication, for space target detection.