Thermo-Compensated Silicon Photo-Multiplier with On-Chip Thermistor

Thermo-Compensated Silicon Photo-Multiplier with On-Chip Thermistor

Docket: UAH-P-15015


In the past decade, silicon photo-multipliers (SiPM) have been actively used in new photodetectors across numerous fields due to their excellent detection of low intensity light. SiPMs are a novel type of solid state detector which consists of a matrix of avalanche photodiodes operated in Geiger mode. Their compact size, good single photon counting resolution, high photon-detection efficiency (up to 60%), high gain (106), and insensitivity to magnetic fields make them suitable for many applications. However, their main limitation is the temperature dependence of several important characteristics like gain, noise, and photon detection efficiency.

Researchers at UAH have developed a SiPM device that allows the maintenance of a constant overvoltage value, and therefore stable SiPM gain and photon detection efficiency, for operation at average light intensities below 100,000 photons per second per one SiPM device. This simple approach for temperature compensation eliminates the need in complicated systems to stabilize SiPM gain, does not require extra power, and does not increase size or cost. It does this without degrading SiPM performance.


  • Photodetectors


  • Not temperature dependent
  • Low cost
  • No extra power consumption
  • No increase in size


  • State of Development: Prototype
  • Licensing Status: Available for licensing
  • Patent Status: Patented