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学者姓名：王云新
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摘要 ：
A photonics-assisted frequency conversion and self-interference cancellation approach is proposed and experimentally demonstrated for in-band full-duplex (IBFD) communication. Carrier suppressed single sidebands (CS-SSB) of the intermediate frequency (IF) signal and the local oscillator (LO) signal are simultaneously obtained through the X-DPMZM in a dual-polarization dual-parallel Mach-Zehnder (DP-DPMZM) modulator. A transmit signal with high purity is produced, and a shared LO optical sideband is also provided for the subsequent downconversion. The carrier suppressed double sideband (CS-DSB) modulation for the signal of interest (SOI) is achieved via the Y-DPMZM. The self-interference signal is suppressed by adjusting the bias voltage of its main MZM. An optical bandpass filter (OBPF) is combined to realize frequency downconversion. The experimental results show that the spurious-free dynamic range (SFDR3) is 102.6 dB/Hz(2/3) for frequency upconversion, a cancellation depth of more than 50 dB for single-frequency self-interference cancellation (SIC), and more than 22 dB for wideband SIC. The proposed link has superiority in multifunctionality, including in-band transmission, reception, and self-interference cancellation, with a shared LO.
关键词 ：
Frequency conversion Frequency conversion self-interference cancellation self-interference cancellation Interference cancellation Interference cancellation Optical polarization Optical polarization Silicon Silicon Optical modulation Optical modulation microwave photonics microwave photonics Microwave photonics Microwave photonics Microwave communication Microwave communication Optical filters Optical filters in-band full duplex com- munication in-band full duplex com- munication
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| GB/T 7714 | Wang, Dayong , Li, Peihan , Wang, Yunxin et al. Photonics-Assisted Frequency Conversion and Self-Interference Cancellation for In-Band Full-Duplex Communication [J]. | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2022 , 40 (3) : 607-614 . |
| MLA | Wang, Dayong et al. "Photonics-Assisted Frequency Conversion and Self-Interference Cancellation for In-Band Full-Duplex Communication" . | JOURNAL OF LIGHTWAVE TECHNOLOGY 40 . 3 (2022) : 607-614 . |
| APA | Wang, Dayong , Li, Peihan , Wang, Yunxin , Li, Tao , Yang, Feng , Zhou, Tao et al. Photonics-Assisted Frequency Conversion and Self-Interference Cancellation for In-Band Full-Duplex Communication . | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2022 , 40 (3) , 607-614 . |
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摘要 ：
本文以离轴菲涅耳数字全息实验为基础,探讨了基于角谱衍射传播方法进行数字全息图重建的成像性能,重点挖掘数值计算背后的物理机理,帮助学生更好地理解所涉及的信息光学知识点。首先,介绍了离轴菲涅耳数字全息图常用两种再现方法的原理,分别是频域滤波方法和空域直接回传方法;然后,利用模拟实验分析了这两种方法在实现成像分辨率和视场方面的特征,把全息理论与仿真现象充分地联系起来,揭示隐藏在数值计算之后的光学原理。本文通过对数字全息图前向和后向传播获取再现像的对比分析,加深对傅里叶变换、衍射传播、频谱滤波等基本物理概念的理解和掌握。
关键词 ：
数字全息 数字全息 全息成像 全息成像 频谱滤波 频谱滤波 角谱衍射传播 角谱衍射传播 离轴菲涅耳光路 离轴菲涅耳光路
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| GB/T 7714 | 赵洁 , 王大勇 , 王云新 et al. 角谱法数值再现离轴菲涅耳数字全息成像的物理机制探讨 [J]. | 物理与工程 , 2021 , 31 (04) : 75-81 . |
| MLA | 赵洁 et al. "角谱法数值再现离轴菲涅耳数字全息成像的物理机制探讨" . | 物理与工程 31 . 04 (2021) : 75-81 . |
| APA | 赵洁 , 王大勇 , 王云新 , 戎路 , 李平雪 . 角谱法数值再现离轴菲涅耳数字全息成像的物理机制探讨 . | 物理与工程 , 2021 , 31 (04) , 75-81 . |
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摘要 ：
光学拍频是大学物理和光学实验教学中的重要内容.由于激光器存在中心波长漂移问题,实验中不易产生可观测的拍频信号.受到微波光子技术中微波波段和光波波段相互作用机理的启发,提出了基于微波频差转换的光学拍频方法.借助强度调制和相位调制将两个频差较小的微波信号调制到同一光载波上,结合光学滤波器获得了两个频差极小的稳定光信号,利用光电探测器实现光学拍频,从仿真和实验两个层面分别获得了可视化的低频拍频信号.该研究为大学物理和光学实验提供了与科学前沿相结合的实验方案,可拓展教学内容和教学深度,有利于培养学生的科学素养.
关键词 ：
光学拍频 光学拍频 实验教学 实验教学 频率变换 频率变换
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| GB/T 7714 | 王云新 , 王大勇 , 杨登才 et al. 基于微波频差转换的光学拍频研究 [J]. | 大学物理 , 2021 , 40 (03) : 43-47 . |
| MLA | 王云新 et al. "基于微波频差转换的光学拍频研究" . | 大学物理 40 . 03 (2021) : 43-47 . |
| APA | 王云新 , 王大勇 , 杨登才 , 李平雪 , 戎路 , 赵洁 . 基于微波频差转换的光学拍频研究 . | 大学物理 , 2021 , 40 (03) , 43-47 . |
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摘要 ：
基于微波频差转换的光学拍频研究
关键词 ：
光学拍频 光学拍频 实验教学 实验教学 频率变换 频率变换
引用：
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| GB/T 7714 | 王云新 , 王大勇 , 杨登才 et al. 基于微波频差转换的光学拍频研究 [J]. | 王云新 , 2021 , 40 (3) : 43-47 . |
| MLA | 王云新 et al. "基于微波频差转换的光学拍频研究" . | 王云新 40 . 3 (2021) : 43-47 . |
| APA | 王云新 , 王大勇 , 杨登才 , 李平雪 , 戎路 , 赵洁 et al. 基于微波频差转换的光学拍频研究 . | 王云新 , 2021 , 40 (3) , 43-47 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
A broadband photonic microwave signal processor based on integrated dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM) is proposed. The processor has a tunable local oscillator (LO) signal, which is generated by the optoelectronic oscillator (OEO) loop in one of the sub-DPMZM with high spectral purity and low phase noise, and its center frequency can be tuned by electronic band-pass filter (EBPF). Using the bias voltage of DP-DPMZM and fiber Bragg grating, the carrier-suppressed single-sideband (CS-SSB) modulation of LO and RF signals can be realized, and the up or down conversion of frequency converter can be realized by adjusting the single bias voltage of DP-DPMZM. Moreover, the power fading caused by dispersion is well compensated with the SSB modulation. The experimental results show that the tunable LO signal of 6-20 GHz is successfully generated, the side mode rejection ratio is as high as 48.4 dB, and the 10 kHz phase noise is 107.6 dBc/Hz at 8 GHz. The spurious rejection ratio of up-down conversion signal is 31.4 dB and 33.6 dB, respectively. © 2021 SPIE
关键词 ：
Bandpass filters Bandpass filters Bias voltage Bias voltage Fiber Bragg gratings Fiber Bragg gratings Light modulators Light modulators Modulation Modulation Optoelectronic devices Optoelectronic devices Phase noise Phase noise
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| GB/T 7714 | Yang, Feng , Wang, Dayong , Wang, Yunxin et al. Broadband photonic microwave signal processor with frequency up/down conversion and tunable OEO [C] . 2021 . |
| MLA | Yang, Feng et al. "Broadband photonic microwave signal processor with frequency up/down conversion and tunable OEO" . (2021) . |
| APA | Yang, Feng , Wang, Dayong , Wang, Yunxin , Yang, Dengcai , Hou, Xueyuan . Broadband photonic microwave signal processor with frequency up/down conversion and tunable OEO . (2021) . |
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摘要 ：
Photonics-Assisted frequency conversion based on cascaded modulators is an effective way to satisfy the requirements of distributed antenna array applications. A filter-free photonic image-rejection down-converter with immunity to dispersion-induced power fading is proposed and demonstrated. The radio frequency (RF) signal from the distributed antenna unit is injected into a dual-drive Mach-Zehnder modulator (DDMZM) through an electrical 90° hybrid coupler (HC), and a single-sideband (SSB) signal is realized. It is then transmitted to the center office by an optical fiber link. At the center office, the modulated RF signal is injected into a dual-polarization dual-parallel MZM (DP-DPMZM) after a polarization controller (PC). Afterwards, an LO signal remodulates it through the Y-DPMZM, and carrier-suppressed SSB modulation is fulfilled via another electrical 90° HC. After the power splitting, quadrature I and Q IF signals can be obtained by a photonics-based continuously adjustable phase shifter. Through a combination of the I/Q IF signals with a low-frequency electrical 90° HC, a photonics image-rejection down-converter based on phase cancellation is realized. Moreover, no optical filter is required; thus, the image-rejection down-converter can work with a large bandwidth. The proposed filter-free photonic image-rejection down-converter is theoretically analyzed and experimentally verified. © 2009-2012 IEEE.
关键词 ：
Fading (radio) Fading (radio) Polarization Polarization Modulators Modulators Photonics Photonics Optical fibers Optical fibers Electric connectors Electric connectors Antenna arrays Antenna arrays Image converters Image converters
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| GB/T 7714 | Wang, Dayong , Yang, Feng , Wang, Yunxin et al. Filter-Free Photonic Image-Rejection Down-Conversion for Distributed Antenna Applications [J]. | IEEE Photonics Journal , 2021 , 13 (2) . |
| MLA | Wang, Dayong et al. "Filter-Free Photonic Image-Rejection Down-Conversion for Distributed Antenna Applications" . | IEEE Photonics Journal 13 . 2 (2021) . |
| APA | Wang, Dayong , Yang, Feng , Wang, Yunxin , Chen, Zhiyu , Yang, Dengcai , Wu, Fuzheng . Filter-Free Photonic Image-Rejection Down-Conversion for Distributed Antenna Applications . | IEEE Photonics Journal , 2021 , 13 (2) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
For a noncooperative target, multiple-dimension detection is required to determine its spatial location. A microwave photonic radar is proposed for simultaneous detection of the distance and direction of targets. At the transmitter, a linear frequency modulation (LFM) signal with a large instantaneous bandwidth was obtained by frequency doubling. Meanwhile, the optical reference signal was supplied. At the receiver, two antennas with a certain baseline length were used to receive the echo signal. The dechirp process and fixed-length cable are combined to decouple the distance and direction and distinguish between the positive and negative directions of a target. Theoretical derivation has already verified that the distance and direction can be resolved simultaneously by dechirping of the echo modulation signal and reference signal. In experiments, an LFM signal with an instantaneous bandwidth of 2 GHz (2-4 GHz) was generated and launched as the detection signal. Targets at different distances with positive and negative angles were detected. The results show that the directional measurement ranges from -72.5 0 to 72.5 degrees, and the error is less than 1.6 degrees. The measured distance was found to be quite similar to the actual distance. The proposed approach can confirm the spatial location of a noncooperative target by combining the detection of both distance and direction. Furthermore, the baseline length need not be less than half the wavelength of the echo signal, and large antennas can be chosen to improve the detection distance and range accuracy. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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| GB/T 7714 | Wang, Yunxin , Hou, Xueyuan , Li, Tao et al. Simultaneous detection of the distance and direction for a noncooperative target based on the microwave photonic radar [J]. | OPTICS EXPRESS , 2021 , 29 (20) : 31561-31573 . |
| MLA | Wang, Yunxin et al. "Simultaneous detection of the distance and direction for a noncooperative target based on the microwave photonic radar" . | OPTICS EXPRESS 29 . 20 (2021) : 31561-31573 . |
| APA | Wang, Yunxin , Hou, Xueyuan , Li, Tao , He, Ziang , Wang, Dayong , Yang, Feng et al. Simultaneous detection of the distance and direction for a noncooperative target based on the microwave photonic radar . | OPTICS EXPRESS , 2021 , 29 (20) , 31561-31573 . |
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摘要 ：
By virtue of its versatile recording geometries, ptychography is a promising full-field lensless phase imaging approach in the prosperous research area of terahertz imaging. In this paper, we propose an extrapolation extended ptychographical iterative engine, named as the EE-PIE reconstruction algorithm, to increase the lateral resolution of terahertz ptychography. A divergent spherical beam is applied to illuminate the object, while diffraction patterns are recorded in the Fresnel region. The signal-to-noise ratio of the diffraction patterns is enhanced under divergent probe illumination, while the size of the diffraction patterns is numerically enlarged by the proposed algorithm. Both the reconstruction quality and the resolution are enhanced without adding to the complexity of the setup or increasing the data acquisition time. The proposed method is experimentally demonstrated using a cluster of phylloclades, a patterned polypropylene plate and a Siemens star target. Compared with the planar illumination, the resolution of the divergent spherical illumination is improved by 2.14 times. On this basis, the extrapolation algorithm further improves the experimental resolution by 1.26 times.
关键词 ：
Divergent illumination Divergent illumination Extrapolation algorithm Extrapolation algorithm Phase imaging Phase imaging Ptychography Ptychography Terahertz imaging Terahertz imaging
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| GB/T 7714 | Rong, Lu , Tan, Fangrui , Wang, Dayong et al. High-resolution terahertz ptychography using divergent illumination and extrapolation algorithm [J]. | OPTICS AND LASERS IN ENGINEERING , 2021 , 147 . |
| MLA | Rong, Lu et al. "High-resolution terahertz ptychography using divergent illumination and extrapolation algorithm" . | OPTICS AND LASERS IN ENGINEERING 147 (2021) . |
| APA | Rong, Lu , Tan, Fangrui , Wang, Dayong , Zhang, Yaya , Li, Kunlun , Zhao, Jie et al. High-resolution terahertz ptychography using divergent illumination and extrapolation algorithm . | OPTICS AND LASERS IN ENGINEERING , 2021 , 147 . |
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摘要 ：
电光调制器的半波电压和带宽主要取决于其电极结构,基于绝缘体上铌酸锂(lithium niobate on insulator, LNOI)结构调制器波导与基底折射率差为传统工艺的10倍左右,能够大幅提高光场和电场的重叠度,降低调制器的半波电压,提升调制带宽.当前迫切需要针对这一新型调制结构的电极进行优化设计.应用COMSOL Multiphysic和HFSS软件对LNOI结构的强度调制器进行协同仿真和优化设计.主要讨论了电极宽度、电极厚度、电极间距和上下包层厚度对调制器特性参数的影响,得到了调制器的电光重叠积分、微波折射率、微波衰减系数和电极特性阻抗等参数.在此基础上,通过约束算法优化设计这些...
关键词 ：
相速匹配 相速匹配 电极结构参数 电极结构参数 协同仿真 协同仿真 重叠积分 重叠积分 薄膜铌酸锂 薄膜铌酸锂 行波电极 行波电极
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| GB/T 7714 | 杨登才 , 陈雨康 , 王云新 et al. 铌酸锂薄膜调制器的协同仿真与优化设计 [J]. | 北京工业大学学报 , 2021 , 47 (06) : 565-572 . |
| MLA | 杨登才 et al. "铌酸锂薄膜调制器的协同仿真与优化设计" . | 北京工业大学学报 47 . 06 (2021) : 565-572 . |
| APA | 杨登才 , 陈雨康 , 王云新 , 向美华 , 陈智宇 , 刘萍萍 et al. 铌酸锂薄膜调制器的协同仿真与优化设计 . | 北京工业大学学报 , 2021 , 47 (06) , 565-572 . |
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摘要 ：
In the present of microscopic imaging technology, both the large imaging field of view (FOV), and high-resolution are required. The Fourier ptychographic microscopy (FPM) does not need to move the sample and can keep the original FOV unchanged. It can expand the frequency bandwidth and reconstruct high-resolution intensity and phase images by using the angle diversity and synthetic aperture. It has a very important application prospect in the field of biomedical detection. However, the LED, used as the illumination source in the FPM, is an extended light source, and the light emitting unit with a certain size will cause the image blurring. Therefore, a reconstruction algorithm based on Lucy-Richardson (L-R) deconvolution is proposed in this paper. The experimental results show that the proposed algorithm can solve the problem of image blurring in FPM imaging and improve the imaging quality. © 2020 SPIE.
关键词 ：
Light Light Light sources Light sources Imaging techniques Imaging techniques Image enhancement Image enhancement Optical instruments Optical instruments Deconvolution Deconvolution Fourier transforms Fourier transforms Light emission Light emission Synthetic apertures Synthetic apertures
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| GB/T 7714 | Sun, Yan , Wang, Dayong , Wang, Yunxin et al. Improvement of imaging quality of Fourier ptychographic microscopy [C] . 2020 . |
| MLA | Sun, Yan et al. "Improvement of imaging quality of Fourier ptychographic microscopy" . (2020) . |
| APA | Sun, Yan , Wang, Dayong , Wang, Yunxin , Zhao, Jie , Rong, Lu . Improvement of imaging quality of Fourier ptychographic microscopy . (2020) . |
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