采用多像素光子计数器的探测率与虚警率

为了完善多像素光子计数器（MPPC）在激光测距和激光雷达等方面应用的理论基础，对MPPC作为激光测距或激光雷达光探测器的探测率与虚警率进行了系统研究，运用泊松理论提出了基于MPPC的探测率与虚警率模型，推导了相应的解析表达式，并进行了数值分析，发现了一些传统探测器不存在的有趣特性。数值结果显示，利用多像素光子计数器作为激光测距的光接收器时，即使不使用门控（选通）技术，仅仅依靠等效光电子数探测阈值调节技术就可以达到实际应用中激光测距的系统要求。其灵敏度可达到光子量级，并能进行光子数分辨。该模型和结果对于促进MPPC在激光测距和激光雷达方面的应用，实现高灵敏度快速探测有一定的理论和实用价值。

Detection and false-alarm probabilities based on Multi-Pixel Photon Counter

In order to perfect the theoretical basis of Multi-Pixel Photon Counter(MPPC) serving as the detector of laser ranging or laser radar, the detection and false-alarm probability of MPPC were studied in this paper. The model of the detection and false-alarm probability based on MPPC was proposed and the analytical expressions were derived by using Poisson theory. The numerical analysis was also done. Some interesting characteristics were found which were not existed in conventional single point detectors. The numerical results show that the system requirements of laser ranging can be obtained just by adjusting the photoelectron equivalent threshold of MPPC, without the gating technology, if using MPPC as the detector. The sensitivity can reach the photon level and the photon number can be resolved. This model and results have certain significance in theory and to promote the application of MPPC in laser range and laser radar for high sensitivity and fast detection.