Optimization of multi-photon event discrimination levels using Poisson statistics



: Soukka J., Virkki A., Hänninen P., Soini J.

: 2004

 Optics Express

: Optics Express

: 12

: 1

: 84

: 89

: 6

: 1094-4087

DOI: https://doi.org/10.1364/OPEX.12.000084

: http://api.elsevier.com/content/abstract/scopus_id:2942717048


In applications where random multi-photon events must be distinguishable from the background, detection of the signals must be based on either analog current measurement or photon counting and multi-level discrimination of single and multi-photon events. In this paper a novel method for optimizing photomultiplier (PMT) pulse discrimination levels in single- and multi-photon counting is demonstrated. This calibration method is based on detection of photon events in coincidence to short laser pulses. The procedure takes advantage of Poisson statistics of single- and multi-photon signals and it is applicable to automatic calibration of photon counting devices on production line. Results obtained with a channel photomultiplier (CPM) are shown. By use of three parallel discriminators and setting the discriminator levels according to the described method resulted in a linear response over wide range of random single- and multi-photon signals. © 2004 Optical Society of America.



Last updated on 14/10/2025 09:45:10 AM