Single Photon Counting Modules (SPCM) Datasheet

Excelitas Technologies’ newly improved SPCM-AQRH Single Photon Counting Module detects single photons over the wavelength range of 400 nm to 1060 nm 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 a peak photon detection efficiency greater than 70% at 700 nm over a 180 μm 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 50 Ω.