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Photonics Research 2024年第5期12卷 921-931页

作者： YISI dong WENWEN LI JiNRAN ZHANG WENRUI LUo HAIJIN FU XU XING PENGCHENG HU yongkang dong JIUBIN TAN Center of Ultra-precision Optoelectronic Instrument Harbin Institute of TechnologyHarbin 150080China Key Laboratory of Ultra-precision Intelligent Instrumentation(Harbin Institute of Technology) Ministry of Industry and Information TechnologyHarbin 150080China National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of TechnologyHarbin 150001China

As the key of embedded displacement measurement,a fiber-optic micro-probe laser interferometer(FMI)is of great interest in developing high-end equipment as well as precision ***,conventional phasegenerated carrier(PGC)approaches are for low-speed scenes and local error analysis,usually neglecting the global precision analysis and dynamic effect of system parameters under high-speed measurement,thus hindering their broad *** present a high-speed PGC demodulation model and method to achieve subnanometer displacement measurement precision in *** model includes a global equivalent resolution analysis and revelation of the demodulation error *** this model,the failure issues regarding the PGC demodulation method under high speed and large range are ***,an ultra-precision PGC demodulation algorithm based on the combination of static and dynamic delay adaptive regulation is proposed to enable high-speed and large-range displacement *** this paper,the proposed model and algorithm are validated through simulation and experimental *** results demonstrate a displacement resolution of 0.1 nm with a standard deviation of less than 0.5 nm when measuring at a high velocity of 1.5 m/s—nearly a tenfold increase of the latest study.

关键词： interferometer fiber displacement

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超快微波光子学频率测量技术(特邀)

激光与光电子学进展 2024年第1期61卷 137-152页

作者：王赫楠陈亮齐永光巴德欣董永康北京控制与电子技术研究所北京102300 哈尔滨工业大学可调谐激光技术国家级重点实验室黑龙江哈尔滨150001 哈尔滨工业大学郑州研究院河南郑州450000

微波光子学频率测量技术利用光学结构和技术产生、操纵、传输和测量高速微波射频信号,将光子学的高带宽、高复用、低损耗与微波技术的高精细、灵活性和易调控等优势相融合,能够大幅提升现有动态频谱监测系统的性能,在电磁空间安全防护... 详细信息

微波光子学频率测量技术利用光学结构和技术产生、操纵、传输和测量高速微波射频信号,将光子学的高带宽、高复用、低损耗与微波技术的高精细、灵活性和易调控等优势相融合,能够大幅提升现有动态频谱监测系统的性能,在电磁空间安全防护、雷达、高速通信等领域具有显著的优势和应用前景。本文概述了微波光子学频率测量技术的研究进展,对比了包括频谱分析型、功率映射型和信道型等3种微波光子学频率测量技术的测频速度、测频精度等关键指标,并论述了基于光学啁啾链瞬态受激布里渊散射效应的微波光子频率测量技术研究工作。

关键词：微波光子学超快微波频率测量频谱分析功率频率映射信道光学啁啾链

Light people:Professor Perry Shum spoke about fiber-enabled industries

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Light(Science & Applications) 2022年第4期11卷 448-452页

作者： yongkang dong Chenzi Guo National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of Technology150001 HarbinChina Light Publishing Group Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of Sciences3888 Dong Nan Hu RoadChangchun 130033China

Editorial Fiber technologies have fundamentally reshaped the way we see,the way we sense,the way we communicate,and the way we *** were so well developed that in some industries such as telecommunication,they were even taken for *** that,Light:Science&Applications invited Professor Pery Shum,a pioneer in fiber technologies and their industrialization,to speak about what chances fber technologies can bring to industries.

关键词： fiber speak shaped

Gas sensing with 7-decade dynamic range by laser vector spectroscopy combining absorption and dispersion

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Photonics Research 2023年第10期11卷 1687-1693页

作者： XIUTAO LOU YUE WANG NING XU yongkang dong School of Physics Harbin Institute of TechnologyHarbin 150001China Photonics Research Institute Department of Electronic and Information EngineeringThe Hong Kong Polytechnic UniversityHong KongChina National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of TechnologyHarbin 150001China

Laser absorption spectroscopy(LAS) has been widely used for unambiguous detection and accurate quantification of gas species in a diverse range of fields. However, up-to-date LAS-based gas sensors still face challenges in applications where gas concentrations change in a wide range, since it is extremely difficult to balance spectral analysis strategies for different optical thicknesses. Here we present laser vector spectroscopy that combines absorption spectroscopy with dispersion spectroscopy, simultaneously taking advantage of the former's high sensitivity in the low-concentration region and the latter's high linearity in the high-concentration region. In the proof-of-concept demonstration of acetylene measurement, it achieves a linear dynamic range of 6 × 10^(7)(R^(2)> 0.9999), which surpasses all other state-of-the-art LAS techniques by more than an order of magnitude,with the capability of highly accurate quantification retained. The proposed laser spectroscopic method paves a novel way of developing large-dynamic-range gas sensors for environmental, medical, and industrial applications.

关键词： laser absorption dispersion

基于宽带声光调制的高保真相位敏感光时域反射计系统

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光学学报 2024年第1期44卷 316-324页

作者：雷艳阳姜桃飞马云宾夏猛汤晓惠隋景林杨芳杜学新董永康哈尔滨工业大学卓越工程师学院黑龙江哈尔滨150001 哈尔滨工业大学郑州研究院河南郑州450018 国家管网集团科学技术研究院河北廊坊065000 哈尔滨工业大学航天学院黑龙江哈尔滨150001

相位敏感光时域反射计(Ф-OTDR)系统通常用于振动监测中,具有响应速度快和检测灵敏度高的优势,但受相干衰落效应的影响,导致振幅较低位置提取的振动信号相位信息失真。为此,本文提出一种基于宽带声光调制的高保真Ф-OTDR传感方案,实现... 详细信息

相位敏感光时域反射计(Ф-OTDR)系统通常用于振动监测中,具有响应速度快和检测灵敏度高的优势,但受相干衰落效应的影响,导致振幅较低位置提取的振动信号相位信息失真。为此,本文提出一种基于宽带声光调制的高保真Ф-OTDR传感方案,实现对振动信号相位信息的高保真提取。该方案具有调制结构简单紧凑、相位延迟控制精确、频率分量灵活可控、不牺牲响应带宽和空间分辨率等优点。在验证实验中,灵活调制脉宽为100 ns,且同时将包含三个非等间距频率的多频探测光脉冲注入2 km的传感光纤,并以幅值评估的方式对多频拍频信号进行复用。结果表明,该方案中相干衰落的概率从17.541%降低到0.045%,并实现了对模拟振动信号相位信息的高保真重构。

关键词：相位敏感光时域反射计相干衰落效应相位信息多频脉冲调制

High-Performance Distributed Brillouin Optical Fiber Sensing

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Photonic Sensors 2021年第1期11卷 69-90页

作者： yongkang dong National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of TechnologyHarbin150001China

This paper reviews the recent advances on the high-performance distributed Brillouin optical fiber sensing, which include the conventional distributed Brillouin optical fiber sensing based on backward stimulated Brillouin scattering and two other novel distributed sensing mechanisms based on Brillouin dynamic grating and forward stimulated Brillouin scattering, respectively. As for the conventional distributed Brillouin optical fiber sensing, the spatial resolution has been improved from meter to centimeter in the time-domain scheme and to millimeter in the correlation-domain scheme, respectively;the measurement time has been reduced from minute to millisecond and even to microsecond;the sensing range has reached more than 100 km. Brillouin dynamic grating can be used to measure the birefringence of a polarization-maintaining fiber, which has been explored to realize distributed measurement of temperature, strain, salinity, static pressure, and transverse pressure. More recently, forward stimulated Brillouin scattering has gained considerable interest because of its capacity to detect mechanical features of materials surrounding the optical fiber, and remarkable works using ingenious schemes have managed to realize distributed measurement, which opens a brand-new way to achieve position-resolved substance identification.

关键词： Distributed sensing stimulated Brillouin scattering Brillouin dynamic grating multi-parameter measurement

Ultra-wide-dynamic-range gas sensing by optical pathlength multiplexed absorption spectroscopy

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Photonics Research 2021年第2期9卷 193-201页

作者： XIUTAO LOU YABO FENG SHUNHU YANG yongkang dong School of Physics Harbin Institute of TechnologyHarbin 150001China National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of TechnologyHarbin 150001China

Laser absorption spectroscopy(LAS) has become the most widely used laser spectroscopic technique for gas detection due to its capability of accurate quantification and straightforward operation. However, since resolving weak absorption and averting over-absorption are always mutually exclusive, the dynamic range of the LAS-based gas sensor is limited and insufficient for many applications in fundamental study and industry. To overcome the limitation on the dynamic range, this article reports optical pathlength(OPL) multiplexed absorption spectroscopy using a gas cell having multiple internal reflections. It organically fuses together the transmission and reflection operation modes: the former directly uses the entire OPL of the gas cell, while the latter interrogates different internal short OPLs by optical interferometry, yielding >100-fold OPL variation. The achieved dynamic range is more than 6 orders of magnitude that surpasses other LAS techniques by 2–3 orders of magnitude. The proposed method promotes a novel way for the development of large-dynamic-range spectroscopic gas sensors for fundamental studies and industrial applications.

关键词： optical absorption dynamic

Eco-friendly polysaccharide coatings for antifouling and dragreduction and potential application for marine devices

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Friction 2024年第4期12卷 726-744页

作者： Hao YANG Liguo QIN Wenhui ZHAO Fagla Jules MAWIGNON Hui GUO yongkang WU Yali ZHANG Guangneng dong Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Institute of Design Science and Basic ComponentsSchool of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Biomedical Information of Ministry of Education School of Life Science and TechnologyXi’an Jiaotong UniversityXi’an 710049China Department of Endocrinology First Affiliated Hospital of Medical CollegeXi'an Jiaotong UniversityXi’an 710061China

Traditional antifouling agents usually have a certain toxic effect on marine environments and non-target *** this study,Dictyophora indusiata polysaccharide(DIP)was applied as a natural antifouling surface modifier to prepare the surface coating for marine *** DIP coatings were prepared:*** spore polysaccharide(DISP),*** volva polysaccharide(DIVP),and *** embryonic body polysaccharide(DIEP).The antifouling,tribological,and anticorrosion behavior of the coatings were *** revealed that the three kinds of DIP coatings had excellent antifouling properties,which could effectively prevent the adhesion of Chlorella and the attachment of water-based and oily stains on the ***,the coatings showed great mechanical stability and could maintain an extremely low coefficient of friction(COF<0.05)after continuous *** drag reduction rate of the coated surfaces reached 5%,showing a powerful lubrication ***,the DIP coatings presented an outstanding corrosion resistance,where the equivalent circuit impedances were 4-9 orders of magnitude higher than the control *** research showed a promising prospect of surface coating fabrication with DIP for marine devices to achieve the purpose of antifouling and drag reduction.

关键词： Dictyophora indusiata polysaccharide(DIP)coating antifouling anticorrosion lubrication and drag reduction

High‐sensitivity distributed dynamic strain sensing by combining Rayleigh and Brillouin scattering

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Opto-Electronic Advances 2020年第12期3卷 1-8页

作者： Benzhang Wang Dexin Ba Qi Chu Liqiang Qiu Dengwang Zhou yongkang dong National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of TechnologyHarbin 150001China

The phase-sensitive optical time-domain reflectometry(φ-OTDR)is a good candidate for distributed dynamic strain sensing,due to its high sensitivity and fast measurement,which has already been widely used in intrusion monitoring,geophysical exploration,*** the frequency scanning basedφ-OTDR,the phase change manifests itself as a shift of the intensity *** correlation between the reference and measured spectra is employed for relative strain demodulation,which has imposed the continuous measurement for the absolute strain ***,the Brillouin optical time domain analysis(BOTDA)allows for the absolute strain demodulation with only one *** this work,the combination of theφ-OTDR and BOTDA has been proposed and demonstrated by using the same set of frequency-scanning optical pulses,and the frequency-agile technique is also introduced for fast measurements.A 9.9 Hz vibration with a strain range of 500 nεhas been measured under two different absolute strains(296.7μεand 554.8με)by integrating the Rayleigh and Brillouin *** sub-micro strain vibration is demonstrated by theφ-OTDR signal with a high sensitivity of 6.8 nε,while the absolute strain is measured by the BOTDA signal with an accuracy of 5.4με.The proposed sensor allows for dynamic absolute strain measurements with a high sensitivity,thus opening a door for new possibilities which are yet to be explored.

关键词： fiber optics sensor Rayleigh scattering Brillouin scattering fast measurement

High-performance optical chirp chain BOTDA by using a pattern recognition algorithm and the differential pulse-width pair technique

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Photonics Research 2019年第6期7卷 652-658页

作者： BENZHANG WANG BAOHUA FAN DENGWANG ZHOU CHAO PANG YUE LI DEXIN BA yongkang dong National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of Technology Harbin 150001 China The 29th Research Institute of China Electronics Technology Group Corporation Chengdu 610036 China

Optical chirp chain Brillouin optical time-domain analysis(OCC-BOTDA) has the capabilities of fast measurement, high Brillouin threshold, and freedom from the nonlocal effect;at the same time, however, it also has problems introduced by transient stimulated Brillouin scattering. The influence of the transient interaction is reflected as the broadened asymmetric Brillouin spectrum, the ghost peak, and the frequency shift of the main peak. This introduces difficulty in computing the fiber Brillouin frequency shift with good measurement accuracy. Besides, the OCC modulation causes additional noise due to the uneven amplitude response for different frequency components. In this work, we propose a high-performance OCC-BOTDA using the principal component analysis(PCA) based pattern recognition algorithm and differential pulse-width pair(DPP) *** building the Brillouin spectrum database(i.e., all patterns), the fiber intrinsic Brillouin frequency shift can be recognized by the PCA algorithm from a nonstandard Brillouin spectrum profile, resulting in good measurement accuracy. Meanwhile, the DPP technique, subtracting between two Brillouin signals generated by two wide-width pump pulses, is utilized to reduce the OCC modulation noise and avoid the pulse self-phase modulation effect in long-range BOTDA sensing. In the experiment, a temperature measurement with 1.3 MHz measurement precision, 4 m spatial resolution, and 5 s measurement time is achieved over a 100 km single-mode fiber.

关键词： pattern recognition algorithm BOTDA