The Excelitas SPCM-AQRH Single Photon Counting Module detects single photons over the wavelength range of 400nm to 1060nm with performance parameters superior to other solid state or vacuum-tube based photon counters.
The SPCM-AQRH uses a unique silicon avalanche photodiode (SLiK) with a circular active area, achieving peak photon detection efficiency greater than 70% at 700nm over a 180µm diameter with unmatched uniformity over the full active area. A TTL level pulse is generated for each photon detected and the signal is available at the BNC connector at the rear of the module. The signal should be terminated into 50Ω.
The module comes with free space window, FC fiber adaptor, C-mount or tube cage mount bracket/adaptor options.