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Links to Detectors and other photon counters are provided as a convenience.  Marina Photonics has confidence that the end user can discern fact from specs spin.  Marina Photonics specializes in sustained Gigahertz Photon Counting that is AFFORDABLE!

Dead time is the time when a photon arrives and is not counted.  This might occur for overlapping photons or photons separated by very short times or for all usb systems during readout.   TTL output devices often have 10 ns dead times and FIFO size limit count rates.   Not being able to count during output is also dead time.  Beware of After-Pulse detector rates that increase with quantum efficiency which have long recovery dead times. BEWARE of spec spin. .

Many 'Photon Counters' are just detectors with an amplifier-discriminator and TTL pulse out that  don't 'count' at all.   Time Correlated Single Photon Counters are boards for computers, NIM (Nuclear Instrumentation Modules) for NIM bins, USB units, or Stand-Alone systems.    Marina Photonics supplies USB computer input at 20 Megabytes/second as well as lossless SUSTAINED 400 Megabyte/second DIO computer input independent of FIFO buffer limitations.

Please see Photon Counting Secrets on the first page of the web site.