基于低噪音放大器的1.55GHz平衡式同体探测器,具有高增益平度
Shaofeng Wang1, Xuyin Niu1, Guangqian Wu1
1Shanxi Key Laboratory of Wireless Communication and Detection, College of Physics and Electronic Engineering, Shanxi University, Taiyuan, Shanxi 030006, China.
The Review of scientific instruments
|February 27, 2025
概括
一种新型号模拟了平衡型同体检测器 (BHD) 中的噪声,并配备了低噪声放大器 (LNA). 优化的BHD设计实现了1.4GHz带宽的1dB平度,增强了量子通信安全性.
科学领域:
- 量子光学是一种量子光学.
- 光学探测器 光学探测器
- 电子工程 电子工程
背景情况:
- 均衡的同位素探测器 (BHD) 对于量子信息处理至关重要.
- 了解和最大限度地减少噪音 (射击噪音和电子噪音) 对于BHD性能至关重要.
- 实现平面宽带频率响应是BHD设计中的一个关键挑战.
研究的目的:
- 介绍BHD中使用级联低噪声放大器 (LNA) 的射击噪声和电子噪声的模拟模型.
- 分析影响BHD增益平坦度的因素.
- 设计和实验验证一个具有增强噪声清除和平面频率响应的BHD.
主要方法:
- 开发一个模拟模型,用于BHD噪声特征与级联的LNA.
- 对影响增益平坦度的参数进行分析.
- 设计一个包含LNA和优化印刷电路板 (PCB) 布局的BHD.
- 对BHD的频率响应,信号噪声比 (SNR),线性和常态拒绝比 (CMRR) 的实验性表征.
主要成果:
- 设计的BHD实现了1.4GHz带宽的1dB平度和-3dB带宽的1.55GHz.
- 在1GHz使用4mW光输入时,获得了12dB的SNR.
- 在射击噪声输出到8mW光学输入时观察到出色的线性.
- 通过实验验证了63dB的常态拒绝比 (CMRR).
结论:
- 开发的模拟模型准确地预测了BHD噪声性能.
- 优化的BHD设计成功地实现了射击噪音和电子噪音之间的大分离.
- 该BHD表现出适合高速量子应用的平面宽带频率响应.
- 这种BHD非常适合用于高速连续变量量子密钥分布和量子随机数生成.
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