太赫兹混频器噪声系数测量

陶星宇; 刘文杰; 孙粤辉; 秦菲菲; 宋青娥; 赵泽宇; 刘丽娟; 陈天香; 王云才

doi:10.37188/CO.2023-0193

太赫兹混频器噪声系数测量

doi: 10.37188/CO.2023-0193

cstr: 32171.14.CO.2023-0193

陶星宇^1,,
刘文杰^{1, 2, 3},
孙粤辉^{1, 2, 3},
秦菲菲^{1, 2, 3},
宋青娥⁴,
赵泽宇¹,
刘丽娟¹,
陈天香¹,
王云才^{1, 2, 3, ,}

1.
广东工业大学信息工程学院先进光子技术研究院, 广东广州 510006
2.
广东工业大学通感融合光子技术教育部重点实验室, 广东广州 510006
3.
广东工业大学广东省信息光子技术重点实验室, 广东广州 510006
4.
电子测试技术重点实验室, 山东青岛 266555

基金项目: 国家自然科学基金（No. 61927811）

详细信息

作者简介:
王云才（1965—），男，广东工业大学特聘教授，博士生导师，1986年于南开大学电子科学系获得学士学位，1994、1997年分别于中国科学院西安光学精密机械研究所获得工学硕士和理学博士学位，主要从事混沌、随机数、噪声的产生、应用与研究方面的工作。E-mail：wangyc@gdut.edu.cn

中图分类号: TN209
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- 被引次数: 0
出版历程
- 收稿日期: 2023-10-28
- 修回日期: 2023-12-25
- 网络出版日期: 2024-04-30

Noise figure measurement of terahertz mixer

TAO Xing-yu^1
,,
LIU Wen-jie^{1, 2, 3},
SUN Yue-hui^{1, 2, 3},
QIN Fei-fei^{1, 2, 3},
SONG Qing-e⁴,
ZHAO Ze-yu¹,
LIU Li-juan¹,
CHEN Tian-xiang¹,
WANG Yun-cai^{1, 2, 3
, ,}

1.
Institute of Advanced Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
2.
Key Laboratory of Photonic Technology for Integrated Sensing and Communication, Ministry of Education of China, Guangdong University of Technology, Guangzhou 510006, China
3.
Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong University of Technology, Guangzhou 510006, China
4.
Science and Technology on Electronic Test & Measurement Laboratory, Qingdao 266555, China

Funds: Supported by the National Natural Science Foundation of China (No. 61927811)

More Information

Corresponding author: wangyc@gdut.edu.cn

摘要

摘要:
噪声系数是评价高频电子器件传输信号性能的重要参数，随着工作频率的增加，高频电子器件的噪声系数通常会增大，现有噪声源的超噪比无法满足测量需求。为了实现高频电子器件噪声系数的测量，本文基于非相干光混频技术，将三束非相干光耦合进入单行载流子光电二极管，研制了220~325 GHz高超噪比且可调谐的太赫兹光子噪声源，超噪比可调谐至45 dB。通过Y因子法将其应用于大噪声系数、负变频增益太赫兹混频器噪声系数的测量。测量得到太赫兹混频器噪声系数的范围为16~32 dB，变频增益约为−13 dB，测量不确定度为0.43 dB。研制的高超噪比且可调谐的太赫兹光子噪声源，能够满足大噪声系数太赫兹电子器件的测量需求，对太赫兹电子器件噪声系数的测量以及指导器件的进一步优化有着重要的作用。
- 噪声系数 /
- 噪声源 /
- 太赫兹混频器 /
- 光混频 /
- Y因子法
Abstract:
Noise Figure (NF) is an important parameter in evaluating the performance of transmitting a signal from a high-frequency electronic device. As the operating frequency increases, the NF of high-frequency electronic devices usually increases, and the Excess Noise Ratio (ENR) of existing noise sources cannot meet the associated measurement requirements. Therefore, to meet the measurement requirements for the NF of high-frequency electronic devices, we propose combining three incoherent optical beams into an unitraveling carrier photodiode (UTC-PD) based on incoherent optical mixing technology. A tunable terahertz (THz) photonics noise source with a high ENR in the 220−325 GHz frequency range is developed. The ENR can be tuned up to 45 dB. By using the Y-factor method, the proposed THz photonics noise source is applied to measure a THz mixer with large NF and negative conversion gain. The measured NF of the THz mixer ranges from 16 to 32 dB, the conversion gain is about −13 dB, and the uncertainty is 0.43 dB. The tunable THz photonics noise source with high ENR can meet the measurement requirements of THz electronic devices with high NF. It will play an important role in the measurement of NF of THz electronic devices and in guiding further optimization.
- noise figure /
- noise source /
- terahertz mixer /
- optical mixing /
- Y-factor method

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图 1 光信号转换为电噪声信号的原理图

Figure 1. Schematic diagram of conversion of the optical signal to the electrical noise signal

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图 2 噪声源（a）原理图及（b）实物图

Figure 2. (a) Schematic diagram and (b) physical diagram of the noise source

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图 3 超噪比与光电流的关系。（a）超噪比随光电流的变化趋势；（b）不同光电流对应的超噪比频谱

Figure 3. The relationship between the ENR and the photocurrent. (a) The trend of the ENR varying with photocurrent; (b) the frequency spectra under different photocurrents

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图 4 噪声系数测量装置示意图

Figure 4. Schematic diagram of NF measurement device

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图 5 超噪比为20 dB、25 dB和30 dB时测得的功率谱

Figure 5. The power spectra when the ENR is 20 dB, 25 dB, and 30 dB

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图 6 超噪比为35 dB、40 dB和45 dB时测量的噪声系数与增益

Figure 6. NF and gain when the ENR is 35 dB, 40 dB, and 45 dB

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表 1 各物理量的值

Table 1. The values of each physical quantity

物理量 δENR δNF₁₂ δNF₂ δG_dB

计算值 0.27 dB 0.38 dB 0.38 dB 0.27 dB
物理量 F₁ F₂ F₁₂ G
测量值 285.68 1.73 311.58 0.03

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