Detektor jednotlivých fotonů typu SPAD pro laserový přenos času

Abstract

This thesis focuses on the single photon counting detector for laser time transfer developed within the European Laser Timing project. The aim is to modify and test a control circuit of the detector for a single-stage thermoelectrically cooled SPAD TE1 chip with 100 µm active area diameter. Among the characteristics tested are detection delay dependency on temperature for individual circuit components, effective dark count rate for different gate lengths and frequencies and the field of view of the detector. With passive compensation of the detection delay we achieved the temperature drift (-0.05 ± 0.04) ps/C in the range from +24 C to +50 C. Using cooling, we managed to reduce the DCR to 100 kHz for gate frequency 1 kHz, representing a tenfold improvement. By optimising the optics of the detector we obtained the field of view 1 , resp. 1.2 .This thesis focuses on the single photon counting detector for laser time transfer developed within the European Laser Timing project. The aim is to modify and test a control circuit of the detector for a single-stage thermoelectrically cooled SPAD TE1 chip with 100 µm active area diameter. Among the characteristics tested are detection delay dependency on temperature for individual circuit components, effective dark count rate for different gate lengths and frequencies and the field of view of the detector. With passive compensation of the detection delay we achieved the temperature drift (-0.05 ± 0.04) ps/C in the range from +24 C to +50 C. Using cooling, we managed to reduce the DCR to 100 kHz for gate frequency 1 kHz, representing a tenfold improvement. By optimising the optics of the detector we obtained the field of view 1 , resp. 1.2 . .