Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Experimental realization of a low-noise heralded single photon source



Alan L. Migdall, Sergey V. Polyakov, Marco Genovese, Fabrizio Piacentini, I. Ruo Berchera, Ivo P. Degiovanni, Giorgio Brida


We present a heralded single-photon source with a much lower level of unwanted background photons in the output channel by using the herald photon to control a shutter in the heralded channel. The shutter is implemented using a simple field programmable gate array controlled optical switch.
Optics Express


single photon, single photon source, quantum information, fast optical switch, noise, radiometry


Migdall, A. , Polyakov, S. , Genovese, M. , Piacentini, F. , Ruo, I. , Degiovanni, I. and Brida, G. (2011), Experimental realization of a low-noise heralded single photon source, Optics Express, [online], (Accessed April 18, 2024)
Created January 17, 2011, Updated February 19, 2017