激光雷达
测距
光子计数
光学
光子学
单光子雪崩二极管
雪崩二极管
纳秒
响应度
雪崩光电二极管
激光器
CMOS芯片
光电子学
探测器
光子集成电路
抖动
材料科学
物理
计算机科学
电信
电压
量子力学
击穿电压
作者
Lirong Zheng,Rajeev J. Ram
出处
期刊:Optics Express
[The Optical Society]
日期:2023-07-10
卷期号:31 (15): 24307-24307
摘要
Light detection and ranging (LIDAR) is a widely used technique for measuring distance. With recent advancements in integrated photonics, there is a growing interest in miniaturizing LIDAR systems through on-chip photonic devices, but a LIDAR light source compatible with current integrated circuit technology remains elusive. In this letter, we report a pulsed CMOS LED based on native Si, which spectrally overlaps with Si detectors' responsivity and can produce optical pulses as short as 1.6 ns. A LIDAR prototype is built by incorporating this LED and a Si single-photon avalanche diode (SPAD). By utilizing time-correlated single-photon counting (TCSPC) to measure the time-of-flight (ToF) of reflected optical pulses, our LIDAR successfully estimated the distance of targets located approximately 30 cm away with sub-centimeter resolution, approaching the Cramér-Rao lower bound set by the pulse width and instrument jitter. Additionally, our LIDAR is capable of generating depth images of natural targets. This all-Si LIDAR demonstrates the feasibility of integrated distance sensors on a single photonic chip.
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