The SPCM-UV from Excelitas Technologies (Waltham, MA) is a UV-enhanced SPCM (Single Photon Counting Module) with peak sensitivity in the 400–500 nm range. It also offers high photon detection efficiency (PDE) at short wavelengths, low noise performance, and high dynamic range. The SPCM uses a “Geigermode” Si APD (UV-SliK™) with a circular active area that achieves a peak PDE of over 75% at 500 nm over the full 180 μm active area. The photodiode is both thermoelectrically cooled and temperature controlled. The SPCM-UV offers low dark counts down to 25 Mcps.
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