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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 700nm 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.

The photodiode is both thermoelectrically cooled and temperature controlled, ensuring stabilized performance despite ambient temperature changes. Operating temperature range has been increased and the module (case temperature) will function between 5˚C and 70˚C.

Recent electronic circuit improvements have reduced the minimum dead time to 20ns, thereby increasing linearity and improving the dynamic range of the module. Timing resolution of the module was also improved significantly. The SPCM-AQRH has internal protection circuitry that protects the avalanche photodiode and the module electronics from damage due to accidental overload from exposure to ambient lighting.

The SPCM-AQRH-XX-TR uses a specially selected SLiKTM silicon avalanche photodiode with timing resolution better than 250 ps while maintaining peak photon detection efficiency (PDE) of more than 75% at 650 nm. This fast timing-enhanced device is designed to support applications in time-correlated single photon counting (TCSPC), fluorescence lifetime measurements and fluorescence lifetime imaging microscopy (FLIM).

Excelitas' series of photon counting modules are designed and built to be fully compliant with the European Union's RoHS Directive 2011/65/EU.

    
  • Peak PDE: > 70% @ 700 nm
  • 180 μm active area
  • > 35 Mcps dynamic range
  • Gated output
  • Single +5 V supply
  • RoHS-compliant
  • Low after pulse probability
  • High uniformity over large active area
  • Unmatched linearity
  • Factory fitted adapter options

    AdapterConnector typeAdditional
    FCFC/PC fiber adapter-
    Bracket 1SM1 (1.035"-40 internal thread)30 mm cage system
    Bracket 2C-mount (1.00"-32 internal thread)30 mm cage system
Part Number Product Description Price Available Quantity To Cart
SPCM-AQRH-WX SPCM-AQRH-WX On Request 
on request
Order-Info
SPCM-AQRH-WX-FC SPCM-AQRH-WX-FC On Request 
on request
Order-Info
SPCM-AQRH-WX-TR SPCM-AQRH-WX-TR On Request 
on request
Order-Info
SPCM-AQRH-WX-BR1/2 SPCM-AQRH-WX-BR1/2 On Request 
on request
Order-Info
SPCM-AQRH-WX-TR-BR1/2 SPCM-AQRH-WX-TR-BR1/2 On Request 
on request
Order-Info
SPCM-NIR-WX SPCM-NIR-WX On Request 
on request
Order-Info
SPCM-NIR-WX-FC SPCM-NIR-WX-FC On Request 
on request
Order-Info
SPCM-NIR-WX-BR1/2 SPCM-NIR-WX-BR1/2 On Request 
on request
Order-Info