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Wearable ultrasensitive and rapid human physiological monitoring based on microfiber Sagnac interferometer

Science China(Information Sciences) 2024年第3期67卷 281-290页

作者： Xin WANG Hongyou ZHOU Meihua CHEN Yongcheng HE Zhishen ZHANG jiulin gan Zhongmin YANG State Key Laboratory Luminescent Materials and Devices Institute of Optical Communication MaterialsSpecial Glass Fiber and Device Engineering Technology Research and Development Center of Guangdong ProvinceGuangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesSouth China University of Technology Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology Foshan University

High-sensitive and fast-responding flexible strain sensors are essential for the smart wearable devices that precisely and dynamically perceive the weak deformations induced by human physiological signals. Here, a flexible strain sensor via polydimethylsiloxane(PDMS)-encapsulated microfiber Sagnac interferometer was designed and prepared for monitoring the human pulse signals and sound vibrations. The sensor achieved a record-breaking sensitivity(gauge factor, GF = 9977) and an extremely low detection limit(0.00025%) due to the strong polarization-dependent coupling effect in the microfiber coupler and the polarization-mixing effect in the Sagnac loop. The relative intensity demodulation method also enabled a fast response time of 10 μs. The wearable pulse measurements were implemented by attaching this flexible strain sensor directly to human skin at various locations and the waveform details were accurately captured. Taking advantage of the ultra-high sensitivity and fast response performance of the prepared sensor, the real-time dynamic acquisition of the underwater weak signal, such as the hydro-acoustic waves with a wide range of 20 Hz–16.86 k Hz, has been demonstrated. These initial results pave the way for a new and innovative category of underwater wearable devices with rapid detection of human physiological signals and weak environmental vibrations.

关键词： flexible strain sensor microfiber Sagnac interferometer underwater detection

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Switchable photothermal conversion efficiency for reprogrammable actuation

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npj Flexible Electronics 2023年第1期7卷 70-78页

作者： Yongcheng He Haojun Liu Jiajia Luo Nuo Li Lihua Li Puxian Xiong jiulin gan Zhongmin Yang State Key Laboratory Luminescent Materials and Devices Institute of Optical Communication MaterialsSpecial Glass Fiber and Device Engineering Technology Research and Development Center of Guangdong ProvinceGuangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesSouth China University of Technology510641 GuangzhouChina Future Institute of Technology School of Information and Optoelectronic Science and EngineeringSouth China Normal University510515 GuangzhouChina

Reprogrammable soft matter brings flexibility to soft robots so that they can display various motions,which is flourishing in soft ***,the reprogramming of photoresponsive materials used in soft robots is time-consuming using existing *** this study,we promote a strategy for rapid reprogramming via switchable photothermal conversion efficiency(PCE).The liquid crystalline elastomers doped with semiconductor bismuth compounds(Bi-LCE)used in this work exhibited large photothermal actuation with over 35%shrinkage in 5 s at high PCE state,which demonstrated little deformation at low PCE ***,the material was capable of being reprogrammed up to 10 times,with only 20 min required for one PCE reversible *** on this switchable PCE effect,the same Bi-LCE film displayed various shape changes through different programmable ***,a reprogrammable hollow tube made of PCE reprogrammable materials could tune the diameter,cross-section configuration,and surface morphology,which was crucial for microfluidics *** materials provide endless possibilities for reusability and sustainability in robotics.

关键词： programming consuming bismuth

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Metal-organic framework film for fluorescence turn-on H2S gas sensing and anti-counterfeiting patterns

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Science China Materials 2019年第10期62卷 1445-1453页

作者： Jun Zhang Fang Liu jiulin gan Yuanjing Cui Bin Li Yu Yang Guodong Qian State Key Laboratory of Silicon Materials Cyrus Tang Center for Sensor Materials and ApplicationsSchool of Material Science and EngineeringZhejiang UniversityHangzhou 310027China College of Electrical Engineering Zhejiang UniversityHangzhou 310027China State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials South China University of TechnologyGuangzhou 510640China

Hydrogen sulphide(H2 S)is a common air pollutant,which is produced in various industry ***,it is of crucial importance to detect H2 S in real *** fluorescent sensors were reported aiming at detecting H2 S in solution;however,the fluorescence sensing of gaseous H2 S has not yet been *** this work,we utilized the post-functionalized fluorescent film,MIL-100(In)@Eu3+/Cu2+film,realizing fluorescence turn-on sensing of gaseous H2 S at room temperature for the first time with the limit of detection as low as 0.535 ppm,which is comparable to some reported fluorescent probes for S2-ions and semiconductor based gaseous H2 S *** sensor was designed due to the strong affinity of H2 S with Cu2+.With the formation of CuS,the"antenna effect"between the ligand and Eu3+recovered,resulting in the fluorescence turn-on of Eu3+***,we proposed a new method to realize multi-colour anti-counterfeiting patterns with lanthanide ions ink,taking advantage of the extraordinary smooth surface and uncoordinated carboxylate groups within the MIL-100(In)film.

关键词： H2S gas fluorescence sensing film anti-counterfeiting

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Noise-sidebands-free and ultra-low-RIN 1.5 μm single-frequency fiber laser towards coherent optical detection

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Photonics Research 2018年第4期6卷 326-331页

作者： QILAI ZHAO ZHITAO ZHANG BO WU TIANYI TAN CHANGSHENG YANG jiulin gan HUIHUI CHENG ZHOUMING FENG MINGYING PENG ZHONGMIN YANG SHANHUI XU State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials South China University of Technology Guangzhou 510640 China College of Optoelectronic Technology Chengdu University of Information Technology Chengdu 610225 China Guangdong engineering Technology Research and Development Center of High-Performance Fiber Laser Techniques and Equipments Zhuhai 519031 China Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices Guangzhou 510640 China Guangdong Provincial Key Laboratory of Fiber Laser Materials and Appfied Techniques South China University of Technology Guangzhou 510640 China

A noise-sidebands-free and ultra-low relative intensity noise(RIN) 1.5 μm single-frequency fiber laser is demonstrated for the first time to our best knowledge. Utilizing a self-injection locking framework and a booster optical amplifier, the noise sidebands with relative amplitudes as high as 20 dB are completely *** RIN is remarkably reduced by more than 64 dB at the relaxation oscillation peak to retain below-150 dB∕Hz in a frequency range from 75 kHz to 50 MHz, while the quantum noise limit is -152.9 d B∕***, a laser linewidth narrower than 600 Hz, a polarization-extinction ratio of more than 23 dB, and an optical signal-to-noise ratio of more than 73 dB are acquired simultaneously. This noise-sidebands-free and ultralow-RIN single-frequency fiber laser is highly competitive in advanced coherent light detection fields including coherent Doppler wind lidar, high-speed coherent optical communication, and precise absolute distance coherent measurement.

关键词：噪声边带激光通讯技术发展现状

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基于BOTDR分布式光纤传感技术的架空线路温度检测现场试验研究

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高电压技术 2015年第3期41卷 925-930页

作者：阳林史尊伟黄吉超郝艳捧甘久林曹敏华南理工大学电力学院广州510640 云南电力试验研究院昆明650217

为了实时监测长距离架空线路的温度状态信息,基于Brillouin光时域反射计分布式光纤传感技术研制了一体化的分布式光纤传感系统。实验室环境下,该系统主机最大传感距离为30 km,温度分辨率为±2℃,温度测量范围为-60℃-90℃,空间分辨率为1... 详细信息

为了实时监测长距离架空线路的温度状态信息,基于Brillouin光时域反射计分布式光纤传感技术研制了一体化的分布式光纤传感系统。实验室环境下,该系统主机最大传感距离为30 km,温度分辨率为±2℃,温度测量范围为-60℃-90℃,空间分辨率为10 m。利用该系统对110 k V线路的光纤复合架空地线光缆进行了近19 h现场温度检测试验,并将15.4 km位置的检测结果与光纤光栅传感器检测结果进行了对比。试验结果表明：现场环境下,光纤系统可对OPGW光缆进行分布式温度检测,检测结果基本符合当地温度变化趋势,在15.4 km位置点与光纤光栅传感器监测的温度曲线基本一致,最大差值仅为1.8℃。受光纤制作工艺和熔接点损耗等因素的影响,导致Brillouin散射光谱出现分段现象和现场试验的最大传感距离仅为16 km。试验结果对分布式光纤传感技术在电力工程应用中具有参考意义。

关键词： Brillouin光时域反射计分布式光纤传感在线监测线路光纤复合架空地线现场试验

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混酸体系-电感耦合等离子体质谱法测定进口铜精矿中稀土元素的含量

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中国稀土学报 2022年第2期40卷 307-312页

作者：王斌钟康华余维芳宋武元甘久林杨中民华南理工大学发光材料与器件国家重点实验室广东广州510641 黄埔海关技术中心广东东莞523070 广州海关技术中心广东广州510623

铜精矿中元素组成具有地质成因意义,建立进口铜精矿痕量特征成分分析方法,在产地溯源和掺假识别方面能够发挥重要作用,为口岸入境通关执法提供可靠依据。本方法对8个国家不同矿区的198份进口铜精矿中的稀土含量进行了分析,由于不同矿区... 详细信息

铜精矿中元素组成具有地质成因意义,建立进口铜精矿痕量特征成分分析方法,在产地溯源和掺假识别方面能够发挥重要作用,为口岸入境通关执法提供可靠依据。本方法对8个国家不同矿区的198份进口铜精矿中的稀土含量进行了分析,由于不同矿区的铜精矿成分组成存在差别,已有报道的消解方法不能完全适合所有样品,提出了常压高温HF-HClO_(4)酸-勒福特王水-HClO_(4)消解体系对进口铜精矿样品进行消解,再用配有高基体进样系统和He气碰撞模式的电感耦合等离子体质谱仪测定La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Y等15种稀土元素的含量。在铜精矿的混酸消解体系方法方面进行了重点研究,通过样品性质和不同种类酸的作用机制,优化了混酸配比和添加顺序。选取具有代表性的铜精矿样品进行回收率、精密度及准确度试验,测得方法的回收率在98.3%~107.7%,精密度小于2.9%。计算了15种稀土元素的检出限均在0.00111~0.03680 mg·kg^(-1)。

关键词：电感耦合等离子体原子发射质谱法铜精矿稀土

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Integrated multi-mode glass ceramicﬁber for high-resolution temperature sensing

Advanced Powder Materials

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Advanced Powder Materials 2023年第4期2卷 54-62页

作者： Yongsheng Sun Meihua Chen Puxian Xiong Yuzhen Wang Shuhang Tian Qingquan Jiang Yao Xiao Hongyou Zhou Peishan Shao Qiuqiang Zhan jiulin gan Qi Qian Dongdan Chen Zhongmin Yang School of Materials Science and Engineering School of Physics and OptoelectronicsState Key Laboratory of Luminescent Materials and DevicesInstitute of Optical Communication MaterialsGuangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and DevicesAnd Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesSouth China University of TechnologyGuangzhou 510641China Centre for Optical and Electromagnetic Research National Center for International Research on Green OptoelectronicsSouth China Academy of Advanced OptoelectronicsMOE Key Laboratory&Guangdong Provincial Key Laboratory of Laser Life ScienceSouth China Normal UniversityGuangzhou 510631China

Optical temperature sensors,which can accurately detect temperature in biological systems,are crucial to the development of healthcare *** challenge the state-of-art technology,it is necessary to design single luminescence center doped materials with multi-wavelength emission for optical temperature sensors with more modes and higher ***,an Er^(3+)single-doped KYF4 nanocrystals glass ceramic with an obvious thermochromic phenomenon is reported for theﬁrst time,which shows a different temperature-dependent green,red,and near-infrared luminescence behavior based on thermal disturbance *** addition,Er^(3+)single-doped GCﬁber was drawn and fabricated into multi-mode opticalﬁber temperature sensor,which has superior measured temperature resolution(<0.5℃),excellent detection limit(0.077℃),and high correlation coefﬁcient(R^(2))of *** importantly,this sensor can monitor temperature in different scenarios with great environmental interference resistance and *** results indicate that our sensor shows great promise as a technology for environmental and healthcare monitoring,and it provides a route for the design of opticalﬁber temperature sensors with multi-mode and high resolution.

关键词： Er^(3+) Glass ceramic Thermochromic Opticalﬁber sensor Healthcare monitoring

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基于荧光强度比技术的强抗干扰柔性荧光光纤温度传感器

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激光与光电子学进展 2023年第13期60卷 65-72页

作者：杨安平周鸿猷方婕苏斯杰宋向阳黄梓琪甘久林华南理工大学发光材料与器件国家重点实验室广东广州510641 广东省特种光纤材料与器件工程技术研究开发中心广东广州510641 广东省光纤激光材料与应用技术重点实验室广东广州510641 华南理工大学材料科学与工程学院广东广州510641

为提高接触式柔性光纤温度传感器的稳定性和抗干扰性,提出了一种基于荧光强度比技术解调方法的上转换荧光纳米粒子掺杂的柔性荧光光纤温度传感器。稀土离子掺杂的复合柔性光纤受激发射出稳定荧光,依靠上转换纳米粒子热耦合能级对温度的... 详细信息

为提高接触式柔性光纤温度传感器的稳定性和抗干扰性,提出了一种基于荧光强度比技术解调方法的上转换荧光纳米粒子掺杂的柔性荧光光纤温度传感器。稀土离子掺杂的复合柔性光纤受激发射出稳定荧光,依靠上转换纳米粒子热耦合能级对温度的依赖特性,热耦合能级对应的中心荧光峰的强度随着温度的变化而变化。所提柔性光纤温度传感器将掺杂Er^(3+)的热耦合能级对应的中心荧光峰强度的比值作为温度的表征值,且其温度响应表现为热增强型,即荧光强度随着温度的升高而增强。实验结果表明柔性光纤温度传感器表现出强稳定性和强抗干扰性,同时具备良好的柔性和变形能力、高灵敏度和可重复性,最大绝对灵敏度为0.0038℃^(-1)、最大相对灵敏度为1.29%/℃。

关键词：荧光强度比技术热耦合能级柔性光纤温度传感器抗干扰性

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水肥一体化管理模式对大港冬枣的应用效果

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果树资源学报 2021年第2期2卷 37-38页

作者：荣延军刘洪岺张建凯张波甘久霖天津市滨海新区大港林果种苗站天津300270

为推进和示范天津大港冬枣生产水肥一体化管理模式,项目组应用水肥一体化多功能机械专利设备及其配套技术产品与当地最常使用的果园树带畦灌施肥管理进行田间对比试验,结果表明:示范园冬枣生产实现节水99.8%、节肥75%、提质34.0%(以含... 详细信息

为推进和示范天津大港冬枣生产水肥一体化管理模式,项目组应用水肥一体化多功能机械专利设备及其配套技术产品与当地最常使用的果园树带畦灌施肥管理进行田间对比试验,结果表明:示范园冬枣生产实现节水99.8%、节肥75%、提质34.0%(以含糖量计),综合增效96.9%,土肥水药管理综合降本81.0%,可在生产中推广应用。

关键词：冬枣水肥一体管理模式应用效果

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一种多功能水肥一体化机械设备及其应用

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农业技术与装备 2020年第9期 119-121页

作者：荣延军刘洪岺张建凯张波甘久霖徐福胜滨海新区大港林果种苗站天津300270

为解决我国规模化大田现代农业和林果产业水肥一体机械化多功能管理问题,克服目前我国水肥一体化技术缺陷,笔者发明了一种果园水肥一体化多功能机械专利设备及其配套技术产品。文章阐述了主体设备及其集成系统特征、结构功能、使用技术... 详细信息

为解决我国规模化大田现代农业和林果产业水肥一体机械化多功能管理问题,克服目前我国水肥一体化技术缺陷,笔者发明了一种果园水肥一体化多功能机械专利设备及其配套技术产品。文章阐述了主体设备及其集成系统特征、结构功能、使用技术、应用效果。该设备及其配套技术产品应用在天津大港冬枣生产中实现示范园冬枣提质34.0%(以含糖量计),综合增效96.9%,土肥水药管理综合节本81.0%。

关键词：水肥一体化机械模块化集成发明综合增效综合节本硬核支撑

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