RSS icon
Twitter icon
Facebook icon
Vimeo icon
YouTube icon

Reduced deadtime and higher rate photon-counting detection using a multiplexed detector array

TitleReduced deadtime and higher rate photon-counting detection using a multiplexed detector array
Publication TypeJournal Article
Year of Publication2007
AuthorsS. A. Castelletto, I. P. Degiovanni, V. Schettini, and A. L. Migdall
JournalJournal of Modern Optics
Date Publishedjan
Keywords2007, Single Fellow

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 continuous and pulsed light sources, both of which are important for quantum metrology and quantum key distribution applications.


Subscribe to A Quantum Bit 

Quantum physics began with revolutionary discoveries in the early twentieth century and continues to be central in today’s physics research. Learn about quantum physics, bit by bit. From definitions to the latest research, this is your portal. Subscribe to receive regular emails from the quantum world. Previous Issues...

Sign Up Now

Sign up to receive A Quantum Bit in your email!

 Have an idea for A Quantum Bit? Submit your suggestions to