Hanbury-Brown Twiss interferometry is generally performed to verify single-photon emission. Are there commercial versions of this interferometer?

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Hadar Genish

The interferometer itself is is just a beam splitter. the hard part is the time resolved detection of the photons which usually involves 2 APD and time to voltage converter or other sort of time tagging device. The expected rate of single photon will determine how fast your time tagging device should be and this makes a huge differences in prices. you can find the base products at picoquant, fastcomtec and others.

Angel Luis Alvarez

Thanks a lot, Hadar for your quick and expert answer