2021年4月20日 · In this article, analytical methods are used to obtain a universal SNR comparison of APDs and SPADs for the first time. Different signal and ambient light power levels are evaluated. The low noise characteristic of a typical SPAD leads to high SNR in scenarios with overall low signal power, but high background illumination can saturate the ...

In the absence of other noise sources, an APD therefore provides a signal-to-noise ratio (SNR) which is F1⁄2 worse than a PIN detector with the same quantum efficiency.

Signal to noise ratio (SNR) is an important indicator to measure the performance of high-gain optical sensor. The article first introduced the operating principle of APD sensor. Then three kinds of noise are analyzed in detail.

较之于 PIN 光电二极管，它们具有更高的信噪比 (SNR)、快速响应、低暗电流和高灵敏度的特点。 光谱响应范围通常在 200 至 1150 nm 范围内。 硅 APD 在紫外光到近红外光范围具有高灵敏度，适用于弱光探测。 硅 APD 阵列是一种传感器，将多个硅 APD 排列在单个封装中。 集成光电传感器（例如光电二极管或雪崩光电二极管 (APD)）和从光电传感器读取信号的前端集成电路 (IC)的设备。 适用于测距仪。 InGaAs APD 提供较高的近红外灵敏度，适用于弱光探测。 我们的模 …

2021年5月3日 · In this article, analytical methods are used to obtain a universal SNR comparison of APDs and SPADs for the first time. Different signal and ambient light power levels are evaluated. The low noise characteristic of a typical SPAD leads to high SNR in scenarios with overall low signal power, but high background illumination can saturate the ...

APDs are photodiodes with internal gain produced by the application of a reverse voltage. They have a higher signal-to-noise ratio (SNR) than PIN photodiodes, as well as fast time response, low dark current, and high sensitivity. Spectral response range is typically within 200 to 1150 nm.

The source of APD photodiode sensor working noise and changes of photoelectric conversion SNR (Signal-to-noise ratio) are analyzed and computed in detail. The p

2019年9月1日 · The signal-to-noise ratio SNR (dB) of APD (Si), APD (GaAs) and APD (InGaAs) for operating wavelengths (λ = 1300 nm and λ = 1550 nm) at reverse bias voltage V R = 175 V, room temperature T = 325 K° and different radiation power incident levels.

基于雪崩光电二极管APD阵列的三维成像激光雷达采用激光单脉冲直接获取三维图像。 为了仿真评估系统的性能，主要分析了APD阵列增益对系统信噪比和探测概率的影响，APD阵列的阈值电压对系统探测概率的影响。

APD信噪比的计算公式为SNR = S/N，其中S表示信号的强度，N表示噪声的强度。 一般来说，信号越强、噪声越小，APD的信噪比就越高，系统的性能也就越好。