Back to products

ID101 OEM Visible Photon Counter

Miniature photon counter for OEM applications

  • OEM free-running
  • 35% quantum efficiency
  • Compact and reliable
  • Cost efficient
Intended for large-volume OEM applications, the ID101 is the smallest, most reliable and most efficient single-photon detector on the market. It consists of a CMOS (Complementary Metal Oxide Semiconductor) silicon chip packaged in a standard TO5-8pin header with a transparent window cap.

The chip combines either a 20 μm (ID101-20) or a 50 μm diameter (ID101-50) single-photon avalanche diode and a fast active quenching circuit, which guarantees a deadtime of less than 50 ns. The chip is mounted on top of a single-stage thermoelectric cooler (TEC). Three fibre-coupled versions, the ID101-SMF20, the ID101-MMF50 and the ID101-MMF100 are also available.

The maximum photon detection probability is measured in the blue spectral range (35% at 500 nm). An outstanding timing resolution of less than 60 ps allows high accuracy measurements. The performance of the ID101 detectors is comparable to that of the ID100-20 and ID100-50 modules.

The ID101 can be mounted on a printed circuit board and integrated in apparatuses such as spectrometers or microscopes. The module is used in biological/chemical instrumentation, quantum optics, aerospace and defense applications.

Contrary to legacy photomultiplier tubes (PMTs) and other silicon-based counters manufactured with non-standard custom process, the ID101 detector is fabricated using a qualified commercial CMOS process, which guarantees high reliability.


  • Best-in-class timing resolution (40 ps)
  • Low dead time (45 ns)
  • Small IRF shift at high count rates
  • Peak photon detection at λ = 500 nm
  • Active area diameter of 20 μm or 50 μm
  • Free-space, singlemode or multimode fibre coupling
  • Not damaged by strong illumination
  • Integrated thermoelectric cooler and thermistor
  • Smallest and most reliable SPD on the market
  • Easy to integrate
  • Time-correlated single photon counting TCSPC
  • Fluorescence and luminescence detection
  • Single molecule detection, DNA sequencing
  • Fluorescence correlation spectroscopy
  • Flow cyometry, spectrophotometry
  • Quantum cryptography, quantum optics
  • Laser scanning miscroscopy
  • Adaptive optics
  • Particle physics
  • Dynamic light scattering (DLS)