What is measurement unit In SPAD?

In SPAD (Single Photon Avalanche Diode) technology, the measurement unit typically refers to the quantification of light intensity or photon detection. The primary unit used is the count rate, usually expressed in counts per second (cps), which indicates the number of photons detected by the SPAD within a given time frame. Other relevant units may include volts for electrical signals and nanometers for wavelength measurements, depending on the application.