The passively quenched operation of avalanche photodiode (APD) has been used to characterizing InGaAs/InP APD including punch through voltage, avalanche voltage and break down voltage that are all important in the design of APD for single photon detection
Digestive tract tumors account for 15% and 19.3% of the cancer incidence and deaths, respectively. Early detection of digestive tract tumors is crucial to the reduction of global cancer burden. Two-photon excitation fluorescence lifetime imaging microscop