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Reduced Deadtime and Higher Rate Photon-Counting Detection Using a Multiplexed Detector Array



Stefania Castelletto, Ivo P. Degiovanni, V Schettini, Alan L. Migdall


We present a scheme for a photon-counting detection system that can be operated at incident photon rates higher than otherwise possible by suppressing the effects of detector deadtime. The method uses an array of N detectors and a 1-by-N optical switch with a control circuit to direct input light to live detectors. Our calculations and models highlight the advantages of the technique. In particular, using this scheme, a group of N detectors provides an improvement in operation rate that can exceed the improvement that would be obtained by a single detector with deadtime reduced by 1/N, even if it were feasible to produce a single detector with such a large improvement in deadtime. We model the system for CW and pulsed light sources, both of which are important for quantum metrology and quantum key distribution applications.
Journal of Modern Optics


deadtime, detection, detector, detector array, photon, photon-counting detector, quantum computation, quantum information


Castelletto, S. , Degiovanni, I. , Schettini, V. and Migdall, A. (2007), Reduced Deadtime and Higher Rate Photon-Counting Detection Using a Multiplexed Detector Array, Journal of Modern Optics, [online], (Accessed September 23, 2023)
Created January 19, 2007, Updated October 12, 2021