Cooling Photodiode Arrays
The dark current of any photodetector strongly depends on the detector temperature. Using silicon photodiode arrays or CCDs, cooling may be an advantage if there is low light intensities. InGaAs photodiode arrays operate in the NIR region and are often cooled to reduce their dark-current pattern. To perform cooling with the Peltier-tc, photodiode arrays must be equipped with a built-in Peltier element, a thermistor temperature sensor and a sensor heat sink.