DEPHAN detector is a prototype of a new-type silicon photomultiplier (HD-SiPM) with the amplifying channels (cells) integrated into solid photosensitive area. The new proposed design enables to increase cell density (4.5⋅104 per sq. mm) and significantly widen dynamic range of the detector preserving or even improving its fill factor (>80%) and cross-talk probability (<2%). Threshold sensitivity of the “LiDAR-emulating” system for red and NIR wavelength, its dependence on background illumination, and other key characteristics were measured with the DEPHAN detector and reference detectors (APD, SiPM). Results confirm prospects of the new-type detector for ToF-LiDAR and 3D-imaging systems.
In this paper, we analyze the influence of the crosstalk level and the dynamic range on the basic characteristics of a silicon solid-state photomultiplier and demonstrate their importance for detecting of optical signals with backlight illumination, in particular, for LIDAR application. Experimental results obtained in the study of threshold and fluctuation parameters of detectors with different levels of crosstalk and dynamic range are presented. It is shown that the detector design combining a high dynamic range with a small crosstalk gives a noticeable advantage in such applications.