Photon Detection Efficiency Calculator

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SiPM Photon Detection Efficiency

⚠️ Simplified estimator: PDE = QE × FF × trigger probability is a basic product model. Real PDE is wavelength-dependent and overvoltage-dependent (varies with detector bias). Use supplier datasheets for accurate device specs, not this simplified approximation.

0%80%100%
0%70%100%
0%90%100%

Overall PDE

0.00%

Efficiency Breakdown

0.0000 (Linear)

What is Silicon Photomultiplier (SiPM) Photon Detection Efficiency?

PDE = QE × FF × P_trigger. Silicon Photomultipliers (SiPMs) are solid-state photon counters that detect individual photons. PDE represents the probability that a single incident photon will trigger an avalanche event and be counted. It's the ultimate measure of SiPM performance and determines how many photons are successfully detected versus lost.

Why Each Factor Matters:

  • Quantum Efficiency (QE): The probability a photon creates an electron-hole pair when it hits the silicon. Limited by absorption depth and material properties. Typically 30-90% depending on wavelength.
  • Fill Factor (FF): The fraction of the sensor area that actively detects photons. Dead zones between pixels reduce FF. Modern SiPMs achieve 40-80% fill factors.
  • Trigger Probability (P_trigger): The avalanche gain—once a carrier is created, the probability it triggers an avalanche. Determines if the carrier creates a detectable signal.

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