A hierarchically pipelined data acquisition system for single-photon avalanche diode array

SinglePhotonAvalancheDiode(SPAD)is a typeof highly sensitive diode that can detect single photons. It is, there fore, useful for certain applications that need photons ensing capability. A system, consisting of 32x32 SPAD array, with its controller along side on Virtex-IIProFPGA on board, has been being developed and tested to evince its...