DERIVATION OF SENSITIVITY OF A GEIGER MODE APDS DETECTOR FROM A GIVEN EFFICIENCY TO ESTIMATE TOTAL PHOTON COUNTS

摘要

The detection sensitivity (DS) of the commercial single-photon-receiver based on InGaAs gate-mode avalanche photodiode is estimated. Instalment of a digital-blanking-system (DBS) to reduce dark current makes the difference between DS and the detection efficiency (DE). By numerical simulations, it is found that the blanked number of light-pulses by DBS is as many as a quarter of all incident pulses for a specific operation condition. DS is estimated at 0.27, which is 35percent larger than a given DE.