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学者姓名：王云新
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Abstract ：
太赫兹波作为一种穿透性强、具有非电离性和惧水性的电磁波，可以穿透多种非金属、非极性介质材料。太赫兹计算层析成像技术基于傅里叶中心切片定理和直线传播模型，通过记录不同投影角度下的强度数据，采用滤波反投影等重建算法获得样品三维吸收系数分布和内外部结构信息分布。随着太赫兹成像器件的不断发展和应用场景的拓展，已发展出多种照明模式、成像光路和重建算法，并已在文物保护、骨密度测量和无损检测领域开展了应用探索。概述太赫兹计算层析技术的基本原理，并从提高重建质量、分辨率和采集效率三方面具体介绍太赫兹计算层析成像技术的最新研究。
Keyword ：
照明光场调控 照明光场调控 三维成像 三维成像 太赫兹成像 太赫兹成像 计算层析 计算层析
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| GB/T 7714 | 戎路 , 刘乂铭 , 宁冉 et al. 太赫兹计算层析成像研究进展（特邀） [J]. | 激光与光电子学进展 , 2024 , 61 (02) : 207-224 . |
| MLA | 戎路 et al. "太赫兹计算层析成像研究进展（特邀）" . | 激光与光电子学进展 61 . 02 (2024) : 207-224 . |
| APA | 戎路 , 刘乂铭 , 宁冉 , 赵洁 , 王云新 , 王大勇 . 太赫兹计算层析成像研究进展（特邀） . | 激光与光电子学进展 , 2024 , 61 (02) , 207-224 . |
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Abstract ：
A photonic-assisted reconfigurable LO harmonic downconverter with simultaneous image-rejection and RF self-interference cancellation (SIC) for in-band full-duplex communication is proposed and experimentally investigated based on a dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM). The received signal from the antenna, which includes the radio frequency (RF) signal, image signal (IM) and self-interference (SI) signal, is input into one sub-MZM of the X-DPMZM. The self-reference (SR) signal is input into the other. The Y-DPMZM is used to load the LO signal and is properly biased to obtain the high-order sideband of the LO signal, which was then set as the LO signal of the reconfigurable harmonic frequency downconverter. By matching the power and delay of the SR signal and changing the main bias of the X-DPMZM, the SI signal can be eliminated directly in optical domain. With power splitting after the output of the DP-DPMZM, the quadrature IF signals can be obtained by a photonics-based continuously adjustable phase shifter. Then, photonics image-rejection down-conversion based on phase cancellation is realized after a low-frequency electrical 90 & DEG; hybrid coupler (HC) combines the quadrature IF signals. Both theoretical and experimental investigations are performed. The results show that the SIC has a cancellation depth more than 32 dB for the 10-MHz bandwidth and greater than 19 dB for the 500-MHz bandwidth, the image-rejection has an image-rejection ratio larger than 31 dB for 10-MHz bandwidth and larger than 22 dB for the 100-MHz bandwidth, both in 2(nd)- and 3(rd)-order harmonic down-conversion mode. Experiments are also carried out on the reconfigurable LO harmonic downconverter with simultaneous SIC and image-rejection. A 16-quadrature amplitude modulation (16-QAM) -modulated RF signal is successfully down-converted to a 1-GHz intermediate frequency (IF) signal with self-interference and image frequency cancelled. It is verified that the RF signal can be well recovered from SI and IM signals by the proposed system.
Keyword ：
microwave photonics microwave photonics self-interference cancellation self-interference cancellation reconfigurable lo harmonic downconverter reconfigurable lo harmonic downconverter Image-rejection Image-rejection
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| GB/T 7714 | Yang, Dengcai , Wu, Fuzheng , Yang, Feng et al. Photonic-Assisted Reconfigurable LO Harmonic Downconverter With RF Self-Interference Cancellation and Image-Rejection [J]. | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2023 , 41 (1) : 149-158 . |
| MLA | Yang, Dengcai et al. "Photonic-Assisted Reconfigurable LO Harmonic Downconverter With RF Self-Interference Cancellation and Image-Rejection" . | JOURNAL OF LIGHTWAVE TECHNOLOGY 41 . 1 (2023) : 149-158 . |
| APA | Yang, Dengcai , Wu, Fuzheng , Yang, Feng , Yin, Jing , Wang, Dayong , Wang, Yunxin et al. Photonic-Assisted Reconfigurable LO Harmonic Downconverter With RF Self-Interference Cancellation and Image-Rejection . | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2023 , 41 (1) , 149-158 . |
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Abstract ：
本实用新型设计了一种宽带高分辨率光谱响应测量仪，主要应用于窄线宽光学滤波器的测量，可测得光学器件在不同频率下的插入损耗，包括可调谐光源发出波长连续可调的光信号，光信号作为载波进入电光调制器，可调频率源发射出射频信号输入电桥得到相位相差90°的两路射频信号作为调制信号输入到电光调制器；通过IQ调制器控制电光调制器的偏置电压，调制出载波抑制单边带信号。单边带信号被光分束器分成两路信号强度相等的光信号，一路经过待测光器件进入光电平衡探测器，另一路直接进入光电平衡探测器，数据与信号采集系统采集光电平衡探测器的输出信号，并进行处理，最终得到待测器件的光谱响应。
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| GB/T 7714 | 杨登才 , 冯凌阁 , 杨锋 et al. 一种宽带高分辨率光谱响应测量仪 : CN202221912938.7[P]. | 2022-07-21 . |
| MLA | 杨登才 et al. "一种宽带高分辨率光谱响应测量仪" : CN202221912938.7. | 2022-07-21 . |
| APA | 杨登才 , 冯凌阁 , 杨锋 , 王云新 , 王智勇 , 王卓 . 一种宽带高分辨率光谱响应测量仪 : CN202221912938.7. | 2022-07-21 . |
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Abstract ：
The wavelength of terahertz wave is between those of infrared wave and microwave,with the characteristics of penetration,strong water absorption,and low photon energy,etc. Terahertz imaging has been are widely used in biomedical imaging,anti- terrorism security and non-destructive testing and other fields. The good penetration of terahertz wave is beneficial to detect the internal structure of objects. Phasecontrast imaging can better reflect the internal structure of objects,compared with simple terahertz intensity imaging. Continuous terahertz wave phase-contrast imaging can be divided into point- by- point scanning acquisition method with a single-point detector and full- field recording method with a surface array detector. The former has a low data acquisition rate and cannot image large samples quickly;the latter has a fast data acquisition rate,but also places higher demands on the detector's pixel size and dynamic range. Continuous terahertz wave digital holographic imaging records the hologram by a faceted detector,and then obtains the complex amplitude information of the sample by a reconstruction algorithm. According to different optical path structures,continuous terahertz wave digital holography can be divided into in- line digital holography and off- axis digital holography. In-line digital holography can make full use of the spatial bandwidth product of the detector,but requires a sufficiently high energy ratio of direct and diffracted light after passing through the sample, as well as the problem of twin image interference. Off-axis digital holography introduces a certain angle between the object light and the reference light,which solves the twin image problem and makes the reconstruction process simple.Off-axis image-plane digital holography uses a microscope objective to directly collect the imaging information of the object. Compared with off-axis Fresnel digital holography,this imaging method has fast computation and high resolution,and has been widely applied at visible wavelengths. Besides,this imaging method has been combined with some other high-resolution imaging techniques,resulting in multi- angle illumination digital holography, structured light illumination digital holography etc. However,due to the lack of terahertz devices and the strong absorption of terahertz by polar substances,the terahertz full- field phase-contrast imaging usually requires a compact and simple optical path structure. To the best of my knowledge,no relevant work on terahertz image-plane digital holography has been reported yet. In recent years,various terahertz devices such as lasers,detectors and gratings have been developed rapidly. New terahertz imaging elements such as large numerical aperture terahertz lenses and terahertz solid immersion objectives have emerged, providing strong hardware support for the development of terahertz imaging. In this paper,a continuous terahertz wave image-plane digital holographic imaging method based on TPX lens is proposed. The holographic recording and reproduction process is studied,and the quadratic phase distortion introduced by TPX lens is removed by surface fitting distortion correction. The digital holographic imaging system of terahertz image plane is built. The imaging resolution of the system is quantitatively analyzed by using an amplitude Siemens star sample. Then two phase samples of organic materials and biological samples are imaged. The experiment verifies the effectiveness of the phase contrast imaging method. The introduction of image plane imaging in terahertz band is conducive to improve the resolution and quality of terahertz imaging. It has a wide application prospect in biomedical imaging,nondestructive testing and other fields.
Keyword ：
Image-plane digital holography Image-plane digital holography Digital holography Digital holography Off-axis digital holography Off-axis digital holography Terahertz imaging Terahertz imaging Aberration correction Aberration correction
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| GB/T 7714 | Wang Yunxin , Zhu Jianglei , Zhao Jie et al. Continuous Terahertz Image-plane Digital Holography Based on TPX Lens [J]. | ACTA PHOTONICA SINICA , 2022 , 51 (4) . |
| MLA | Wang Yunxin et al. "Continuous Terahertz Image-plane Digital Holography Based on TPX Lens" . | ACTA PHOTONICA SINICA 51 . 4 (2022) . |
| APA | Wang Yunxin , Zhu Jianglei , Zhao Jie , Wang Dayong , Rong Lu , Lin Shufeng . Continuous Terahertz Image-plane Digital Holography Based on TPX Lens . | ACTA PHOTONICA SINICA , 2022 , 51 (4) . |
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Abstract ：
提出了一种由三维打印技术制作的用于0.3 THz波束调控的二元相位型衍射透镜，可产生轴向焦深为25 mm、腰斑直径为1 mm的太赫兹聚焦波束。将该聚焦波束应用于连续太赫兹波计算机辅助层析成像，不仅将成像分辨率提高到1.5 mm，而且由于扩大了系统景深，提高了成像保真度。这类利用三维打印技术制作的二元衍射元件可有效应用于低频太赫兹波段的光束调控，为太赫兹成像系统的性能优化以及聚焦元件的设计制备提供一种有效途径。
Keyword ：
信息光学 信息光学 太赫兹计算机辅助层析 太赫兹计算机辅助层析 三维打印技术 三维打印技术 二元衍射透镜 二元衍射透镜 光束调控 光束调控
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| GB/T 7714 | 王大勇 , 宁冉 , 金晓宇 et al. 3D打印衍射元件的高分辨太赫兹计算机辅助层析成像研究（特邀） [J]. | 光子学报 , 2022 , 51 (07) : 113-124 . |
| MLA | 王大勇 et al. "3D打印衍射元件的高分辨太赫兹计算机辅助层析成像研究（特邀）" . | 光子学报 51 . 07 (2022) : 113-124 . |
| APA | 王大勇 , 宁冉 , 金晓宇 , 戎路 , 赵洁 , 王云新 et al. 3D打印衍射元件的高分辨太赫兹计算机辅助层析成像研究（特邀） . | 光子学报 , 2022 , 51 (07) , 113-124 . |
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Abstract ：
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.
Keyword ：
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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Abstract ：
A novel type of photonic background-free multiband arbitrarily phase-coded microwave signal generator with power fading elimination capability is reported. An x-polarized phase modulated optical signal and a y-polarized radio frequency (RF) modulated harmonic single-sideband (HSSB) optical signal are produced based on a dual-polarization quadrature phase shift-keying modulator (DP-QPSKM). After polarization modulation to intensity modulation conversion, a microwave signal with arbitrarily phase encoding in multiple frequency bands is generated. Benefiting from the phase modulation state of the driven electrical coded signal, the generated arbitrarily phase-coded signal has no baseband components. Moreover, the equivalent HSSB modulation ensures the system can realize antidispersion transmission of one-to-multi base stations (BSs). The main distinct highlights of our generator are multifunction. The proposed single-modulator-based photonic scheme can achieve phase encoding in arbitrary format over multiple frequency bands and transmit over long-distance single-mode fiber with the elimination of power fading simultaneously. This work is pretty promising in multiband radar systems for one-to-multi BSs transmission and can increase the detection range, range resolution, Doppler tolerance, and sensitivity of objective recognition of radars.
Keyword ：
multiband radars multiband radars Optical polarization Optical polarization arbitrarily phase-coded microwave signals arbitrarily phase-coded microwave signals Optical modulation Optical modulation Antidispersion transmission Antidispersion transmission Microwave theory and techniques Microwave theory and techniques Microwave photonics Microwave photonics Radar Radar Microwave communication Microwave communication Encoding Encoding background-free background-free
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| GB/T 7714 | Zhu, Sha , Fan, Xiaojie , Cao, Xuhua et al. Photonic Generation and Antidispersion Transmission of Background-Free Multiband Arbitrarily Phase-Coded Microwave Signals [J]. | IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES , 2022 , 70 (4) : 2290-2298 . |
| MLA | Zhu, Sha et al. "Photonic Generation and Antidispersion Transmission of Background-Free Multiband Arbitrarily Phase-Coded Microwave Signals" . | IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES 70 . 4 (2022) : 2290-2298 . |
| APA | Zhu, Sha , Fan, Xiaojie , Cao, Xuhua , Wang, Yunxin , Zhu, Ning Hua , Li, Ming et al. Photonic Generation and Antidispersion Transmission of Background-Free Multiband Arbitrarily Phase-Coded Microwave Signals . | IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES , 2022 , 70 (4) , 2290-2298 . |
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Abstract ：
A photonic multi-format background-free binarily modulated microwave signal generator using a single dual-polarization dual-parallel Mach-Zehnder modulator is proposed and demonstrated. The proposed generator features good reconfiguration and switchability. By simply adjusting the direct current biases of the modulator, amplitude shift keying (ASK), phase shift keying (PSK) and frequency-shift keying (FSK) microwave signals can be generated. Benefiting from the complementary intensity modulation, there is no residual baseband modulated signal in the generated binarily modulated signals. The system does not involve any optical or electrical filters, which ensures good tunability of the generator. By changing the frequency of the driven microwave carrier and bit rate of the electrical coded signal, the frequency and rate of the generated multi-format signals can be adjusted accordingly. The multi-format switchable signal generator has great potential in multi-functional communication and radar systems.
Keyword ：
Optical switches Optical switches frequency-shift keying frequency-shift keying signal generation signal generation Modulation Modulation Amplitude shift keying Amplitude shift keying Frequency shift keying Frequency shift keying Microwave photonics Microwave photonics Optical filters Optical filters background-free background-free Microwave filters Microwave filters phase shift keying phase shift keying
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| GB/T 7714 | Zhu, Sha , Chen, Zhijie , Wang, Yunxin et al. Single-modulator Based Multi-Format Switchable Signal Generator Without Background Noise [J]. | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2022 , 40 (20) : 6693-6700 . |
| MLA | Zhu, Sha et al. "Single-modulator Based Multi-Format Switchable Signal Generator Without Background Noise" . | JOURNAL OF LIGHTWAVE TECHNOLOGY 40 . 20 (2022) : 6693-6700 . |
| APA | Zhu, Sha , Chen, Zhijie , Wang, Yunxin , Jin, Ya , Zhai, Kunpeng , Bai, Yunping et al. Single-modulator Based Multi-Format Switchable Signal Generator Without Background Noise . | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2022 , 40 (20) , 6693-6700 . |
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Abstract ：
本发明涉及一种电光相位调制器射频参数的测量方法与装置，用于解决电光相位调制器的射频参数测量过程中相位不可直接测量以及相位抖动问题，包括激光器、保偏光纤分路器、待测电光相位调制器、相位调节器、保偏光纤耦合器、分光器、光电探测器和MZ干涉环路相位稳定控制电路、矢量网络分析仪。相位调节器用于对光载波相位进行调节，待测电光相位调制器对光载波进行调制，两路信号经耦合后经过分光器分成两束，一束光经光电转换后进入矢量网络分析仪，另一束进入MZ控制电路，与相位调节器构成环路，实现对测量过程中由于光纤长度、温度、环境等的影响引起的相位抖动的补偿及控制，进而更准确地对待测电光相位调制器的射频参数进行测量。
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| GB/T 7714 | 王大勇 , 李沛晗 , 王云新 et al. 一种电光相位调制器射频参数的测量方法与装置 : CN202110663236.3[P]. | 2021-06-11 . |
| MLA | 王大勇 et al. "一种电光相位调制器射频参数的测量方法与装置" : CN202110663236.3. | 2021-06-11 . |
| APA | 王大勇 , 李沛晗 , 王云新 , 杨锋 , 戎路 , 赵洁 . 一种电光相位调制器射频参数的测量方法与装置 : CN202110663236.3. | 2021-06-11 . |
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Abstract ：
本发明涉及一种测量光波导模场直径的系统，属于光学测量领域。包括光路系统、位移系统和计算方法三部分，光路系统包括激光器、标准光纤探针、传输光纤和光功率计，其中激光器作为系统的光源，提供稳定的光输入，标准光纤探针作为系统的扫描探头，实现对于波导输出光面能量的扫描，光功率计用于接收光纤探针扫描波导端面时进入探针的功率；位移系统主要包括波导支架、位移平台和压电控制器三部分，其中波导支架用于夹持待测波导，位移平台用于夹持标准光纤探针，压电控制器则是实现对位移平台夹持的标准光纤探针扫描路径的控制，是系统的扫描控制核心。而计算方法则主要包含四个参数的测量与一个计算公式，测量参数为光纤探针直径、光波导Z方向上、下半部分卷积模场直径和Y方向模场直径，而计算公式则是测量得到上述参数与光波导原模场直径之间的函数，可通过推导给出的公式计算得到光波导原模场直径。本发明可实现传统光波导模场直径的高精度测量。
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| GB/T 7714 | 杨登才 , 宝剑锋 , 王云新 . 一种测量光波导模场直径的系统 : CN202111427747.1[P]. | 2021-11-26 . |
| MLA | 杨登才 et al. "一种测量光波导模场直径的系统" : CN202111427747.1. | 2021-11-26 . |
| APA | 杨登才 , 宝剑锋 , 王云新 . 一种测量光波导模场直径的系统 : CN202111427747.1. | 2021-11-26 . |
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