Excelitas SPCM-AQ4C 4-channel Single-Photon Counting Module
PART/ SPCM-AQ4C

SPCM-AQ4C

The SPCM-AQ4C is a four-channel photon counting module capable of detecting single photons of light over the wavelength range from 400 nm to 1060 nm. Each channel is independent from the others.

The SPCM-AQ4C uses a unique silicon avalanche photodiode (SLiK) that has a circular active area of 180 μm diameter with a peak photon detection efficiency exceeding 60% at 650 nm. Each photodiode is both thermoelectrically cooled and temperature controlled, ensuring stabilized performance despite changes in the ambient temperature.

The SPCM-AQ4C module uses an improved circuit with a peak count rate >4M c/s for short bursts of time on all four channels and a count rate of 1.5 M c/s for continuous operation. There is a "dead time" of 50 nanoseconds (ns) between pulses. The module requires +2 Volts, +5 Volt, and +30 Volt power supplies. The output of each channel – a TTL pulse that is 4.5 Volts high (into a 50 Ω load) and 25 ns wide – is available at the card edge behind the circuit board. Each TTL pulse corresponds to a detected photon. All input and output signals are available at the card connector.

  • Peak photon detection efficiency at 650 nm: 60% typical
  • Afterpulsing probability 0.5%
  • Gated input
  • TTL output
  • FC fiber connector mounted and aligned on each detector
  • Four  channels in one package
  • Self-contained APD module with integrated electronics
  • ROHS compliant

 

  • Peak photon detection efficiency at 650 nm: 60% typical
  • Afterpulsing probability 0.5%
  • Gated input
  • TTL output
  • FC fiber connector mounted and aligned on each detector
  • Four  channels in one package
  • Self-contained APD module with integrated electronics
  • ROHS compliant

 

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