Multiplexed Intrinsic PNR SNSPD Arrival Times

This data consists of time tags in the form of arrival times in picoseconds per detection bin relative to a trigger signal. There are 8 spatial bins with 128 temporal bins each, for a total of 1024 detection bins. Each detection bin starts at an arrival time of 0 ps an has a maximum arrival time of 499 ps (there are 500 possible arrival times). The trigger signal was recorded with a fast photodiode from Thorlabs and the detection events correspond to the rising edges of SNSPDs from Single Quantum. The time tags were recorded with two Time Tagger X from Swabian Instruments. In total there are 125 data files that contain the 125 different measured coherent input states. The mean photon numbers per pulse of the coherent states scale quadratically from 0 to 15393. The data is slightly processed (the starting arrival time per bin was set to 0 ps and then stored in a matrix for better clarity). This matrix consists of x rows, where x is the number of trigger signals per coherent input state, and 1024 columns, corresponding to the 1024 detection bins. The order of the detection bins is as follows: all spatial bins for the first temporal bin, then all spatial bins for the second temporal bin, etc. (appropriate functions are provided in Python to convert from index to the corresponding spatial and temporal bin). The number of trigger signals per coherent input state is not consistent, but is ensured to be above $10^5$ for sufficient statistics. This is due to the processing step, where a fixed number of raw time tags were loaded; for a smaller mean photon number per pulse this corresponds to a larger number of trigger signals that can be loaded, as less temporal bins are occupied. Additionally, a lookup table (LUT) is included, which allows to map arrival times on the different detection bins to a photon-number distribution. The LUT has dimension (1024, 500, 15), i.e., for all 1024 detection bins it includes 15 exponentially-modified Gaussian distributions (normalized using a flat prior; for photon numbers from 1 to 15) for the time axis from 0 ps to 499 ps.