用多始多停时间-数字转换器校正非平稳源的二阶关联函数
Calibration of second-order correlation functions for non-stationary sources with a multi-start multi-stop time-to-digital converter
摘要：
提出了一种新型的高通量二阶相关测量系统，该系统记录并利用了在起始探测器和终止探测器处探测到的光子的所有到达时间。该系统特别适合于具有高光子通量和长相干时间的光源，因为它比传统方法更有效，其量等于光源的计数率和相关时间的乘积。我们用这个系统仔细研究了探测器和光子计数器的死时间对双探测器结构中二阶关联函数的影响。对于非平稳光源，在高光子通量下观察到原始信号的失真。通过引入整个测量系统的有效死区时间的概念，设计了一种校准二阶关联函数的系统方法。
英文摘要：
A novel high-throughput second-order-correlation measurement system is developed which records and makes use of all the arrival times of photons detected at both start and stop detectors. This system is suitable particularly for a light source having a high photon flux and a long coherence time since it is more efficient than conventional methods by an amount equal to the product of the count rate and the correlation time of the light source. We have used this system in carefully investigating the dead time effects of detectors and photon counters on the second-order correlation function in the two-detector configuration. For a non-stationary light source, distortion of original signal was observed at high photon flux. A systematic way of calibrating the second-order correlation function has been devised by introducing a concept of an effective dead time of the entire measurement system.
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