Farina S, Labanca I, Acconcia G, Ghioni M, Rech I
Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
Rev Sci Instrum. 2022 May 1;93(5):053102. doi: 10.1063/5.0086312.
The reduction of detector dead time represents an enabling factor in several photon counting applications. In this work, we investigate the free-running operation of reach-through single-photon avalanche diodes (SPADs) at ultra-low dead times. By employing a fast active quenching circuit with direct bonding to the detector, we are able to achieve a 10 ns dead time with a thick SPAD by Excelitas, still maintaining extremely low afterpulsing probabilities (below 1.5%).
探测器死时间的减少是多个光子计数应用中的一个促成因素。在这项工作中，我们研究了直通型单光子雪崩二极管（SPAD）在超短死时间下的自由运行操作。通过采用直接与探测器相连的快速有源猝灭电路，我们能够使Excelitas公司的厚型SPAD实现10纳秒的死时间，同时仍保持极低的后脉冲概率（低于1.5%）。
