Even InGaAs photodiodes exhibit a temperature gradient in detector noise, which is why appropriate cooling and/or thermal stabilization can be very helpful. Cooling can also be achieved using a liquid nitrogen dewar, JT cryostats, or Stirling coolers. However, in industry, electrical/thermoelectric cooling using Peltier elements has become the preferred method. We offer standard 1- and 2-stage TE coolers, and for special configurations, 3- and 4-stage TE coolers are also available. We provide cooling for Ge and InGaAs photodiodes, as well as dual and quadrant photodiodes, and also for sandwich photodiodes composed of UV-Si, Si, Ge, InGaAs, and extended InGaAs.

Ge + InGaAs TE-cooled with fiber joint<br srcset=” width=”150″ height=”150″>Ge+InGaAs TE cooled

 

InGaAs thermoelectrically cooled photodiodes