Characterization of FBK SiPMs under illumination with very fast light pulses

A characterization of the response of SiPMs and SPADs produced at FBK-IRST Trento stimulated with fast laser pulses is presented. The tests were aimed at studying both the intrinsic timing proprieties (of SiPMs and SPADs) using the time-correlated single-photon counting technique and the dynamic range (of SiPMs). Measurements were carried out on devices with different cell size, namely, from 40x40 to 100x100 μm2. Concerning the timing resolution, all the devices exhibit a value less than 150 psec FWHM. The dynamic range of SiPMs shows a response linearity which is in line with the theory describing these devices.