调控栅压可提升脉冲探测效率,但会减少伪事件扩散。
Gate Voltage Effect on Pulse Detection Efficiency of Perimeter-Gated SPADs

- 通过调节栅压控制暗噪声与光子灵敏度的平衡
- 在脉冲光照下,探测效率提升但伪事件分布更集中
- 适用于脉冲激光雷达系统的器件选型指导
周界栅控单光子雪崩二极管(pg-SPAD)以其动态暗噪声调制能力著称,在连续光照下存在噪声与光子敏感度的权衡。然而,该权衡在脉冲光学系统中的影响尚未研究。本文基于0.35 μm标准CMOS工艺实现的pg-SPAD,揭示其在脉冲激励下,可通过调节栅压以提升脉冲探测效率,同时降低突发窗口内伪事件的分布范围。据此,我们提出了面向脉冲激光雷达应用的pg-SPAD最优使用准则。
原文摘要 · Abstract (English)
Perimeter-gated single-photon avalanche diodes (pg-SPADs) are known for their dynamic dark noise modulation capabilities. They are reported to trade noise for photon sensitivity under continuous illumination. However, the implications of this trade-off have not heretofore been studied with pulsed optical systems. This work bridges this gap. We demonstrate that pg-SPADs fabricated in a 0.35 $μ$m standard CMOS process trade-off pulse detection efficiency for a reduction in the the spread of spurious events within a burst window. Consequently, herein, we propose guidelines for the optimal use of pg-SPADs in pulsed LIDAR applications in view of the observed trade-off.
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