相关实验视频

Updated: Jul 16, 2025

X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells

X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells

Published on: August 20, 2019

低噪音开关集成放大器用于低光子流量放射学

Yue Li, Yadong Hu, Yinlin Yuan

|September 14, 2023

概括

对光电探测器来说,达到1000以上的高信号噪声比 (SNR) 对放射测量基准至关重要. 一个新的开关集成放大器 (SIA) 设计使得低噪音,FA级电流检测能够提高性能.

科学领域:

光电子学和探测器物理学
计量学和测量科学计量学和测量科学

背景情况:

精确的放射测量需要高光探测器信号噪声比 (SNR).
为了达到0.3%的相对标准不确定性,需要SNR超过1000个.
低光子流量检测在维持足够的SNR方面提出了挑战.

研究的目的:

设计和评估用于低光子流量检测的开关集成放大器 (SIA).
为了在Femtoampere (fA) 级别达到噪声相当的电流.
为了验证SIA在宽频,低光子流量测量设施中的性能.

主要方法:

开发一个开关集成放大器 (SIA) 电路.
建设一个宽频谱 (350-1000 nm) 低光子流量测量设施.
在光子速率为10^8 s^-1.1的光子探测器SNR的评估.

主要成果:

设计的SIA在fa级实现了与噪声相当的电流.
测量设施使SNR在低光子流量条件下进行评估.
基于SIA的光探测器在测试波长时显示SNR大于1000.

结论:

SIA设计成功地提高了用于低光子流量应用的光电探测器SNR.
开发的测量设备适合评估高SNR光探测器性能.
结果支持实现精确的相关光子放射测量基准.

更多相关视频

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

相关概念视频

MOSFET Amplifiers

MOSFET Amplifiers

The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...