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Fiber-tip polymer clamped-beam probe for high-sensitivity nanoforce measurements

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Light(Science & Applications) 2021年第9期10卷 1768-1779页

作者： Mengqiang Zou Changrui Liao Shen Liu Cong Xiong Cong Zhao Jinlai Zhao Zongsong Gan Yanping Chen Kaiming Yang Dan Liu Ying Wang Yiping Wang key laboratory of Optoelectronic devices and systems of Ministry of Education/GuangDong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China shenzhen key laboratory of photonic devices and sensing systems for internet of things Guangdong and Hong Kong Joint Research Centre for Optical Fibre SensorsShenzhen UniversityShenzhen518060China College of Materials Science and Engineering Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsShenzhen518060China Wuhan National laboratory for Optoelectronics(WNLO) Huazhong University of Science and Technology(HUST)Wuhan430074China shenzhen Huazhong University of Science and Technology Research Institute ShenzhenGuangdong518057China

Micromanipulation and biological,material science,and medical applications often require to control or measure the forces asserted on small ***,we demonstrate for the first time the microprinting of a novel fiber-tip-polymer clamped-beam probe micro-force sensor for the examination of biological *** proposed sensor consists of two bases,a clamped beam,and a force-sensing probe,which were developed using a femtosecond-laser-induced two-photon polymerization(TPP)*** on the finite element method(FEM),the static performance of the structure was simulated to provide the basis for the structural design.A miniature all-fiber micro-force sensor of this type exhibited an ultrahigh force sensitivity of 1.51 nmμN−1,a detection limit of 54.9 nN,and an unambiguous sensor measurement range of~2.9 *** Young’s modulus of polydimethylsiloxane,a butterfly feeler,and human hair were successfully measured with the proposed *** the best of our knowledge,this fiber sensor has the smallest force-detection limit in direct contact mode reported to date,comparable to that of an atomic force microscope(AFM).This approach opens new avenues towards the realization of small-footprint AFMs that could be easily adapted for use in outside specialized *** such,we believe that this device will be beneficial for high-precision biomedical and material science examination,and the proposed fabrication method provides a new route for the next generation of research on complex fiber-integrated polymer devices.

关键词： fiber beam polymer

Single-mode helical Bragg grating waveguide created in a multimode coreless fiber by femtosecond laser direct writing

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photonics Research 2021年第10期9卷 2052-2059页

作者： JUN HE JIA HE XIZHEN XU BIN DU BAIJIE XU CHANGRUI LIAO ZHIYONG BAI YIPING WANG key laboratory of Optoelectronic devices and systems of Ministry of Education/Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China shenzhen key laboratory of photonic devices and sensing systems for internet of things Guangdong and Hong Kong Joint Research Centre for Optical Fibre SensorsShenzhen UniversityShenzhen 518060China

We demonstrate the fabrication of single-mode helical Bragg grating waveguides(HBGWs)in a multimode core-less fiber by using a femtosecond laser direct writing *** approach provides a single-step method for creating Bragg grating ***,the unique helical structure in such an HBGW serves as a depressed cladding waveguide and also generates strong Bragg resonance due to its *** of pulse energy,helical diameter,and helical pitch used for fabricating HBGWs were studied,and a single-mode HBGW with a narrow bandwidth of 0.43 nm and a Bragg wavelength of 1546.50 nm was achieved by using appropriate parameters,including a diameter of 10μm and a helical pitch of 1.07μ*** measured cross-sectional refractive index profile indicates that a depressed cladding waveguide has been created in this single-mode ***,five single-mode HBGWs with various Bragg wavelengths were successfully fabricated by controlling the helical pitch,and this technique could be used for achieving a wavelength-division-multiplexed HBGW ***,the temperature and strain responses of the fabricated single-mode HBGW were tested,exhibiting a temperature sensitivity of 11.65 pm/℃ and a strain sensitivity of 1.29 pm/με,*** addition,the thermal stability of the single-mode HBGW was also studied by annealing at a high temperature of 700℃ for 15 *** degeneration of the single-mode waveguide into a multimode waveguide was observed during the isothermal annealing process,and the peak reflection and the Bragg wavelength of the fundamental mode exhibited a decrease of∼7 dB and a“blue”shift of 0.36 ***,such a femtosecond laser directly written single-mode HBGW could be used in many applications,such as sapphire fiber sensors,photonic integrated circuits,and monolithic waveguide lasers.

关键词： waveguide fiber mode

Encrypted optical fiber tag based on encoded fiber Bragg grating array

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International Journal of Extreme Manufacturing 2023年第3期5卷 658-665页

作者： Zhihao Cai Bozhe Li Zhiyong Bai Dejun Liu Kaiming Yang Bonan Liu Cong Zhao Mengqiang Zou Jie Zhou Shangben Jiang Jingyi Huang Li Liu Xuming Zhang Junle Qu Yiping Wang Changrui Liao shenzhen key laboratory of photonic devices and sensing systems for internet of things Guangdong and Hong Kong Joint Research Centre for Optical Fibre SensorsState Key Laboratory of Radio Frequency Heterogeneous IntegrationShenzhen UniversityShenzhen 518060People’s Republic of China shenzhen key laboratory of Ultrafast Laser Micro/Nano Manufacturing Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China Guangdong laboratory of Artificial Intelligence and Digital Economy(SZ) Shenzhen 518107People’s Republic of China Department of Electronic Engineering Chinese University of Hong KongHong KongPeople’s Republic of China Department of Applied Physics The Hong Kong Polytechnic UniversityHongKongPeople’sRepublic of China

Optical fibers are typically used in telecommunications services for data transmission,where the use of fiber tags is essential to distinguish between the different transmission fibers or channels and thus ensure the working functionality of the communication *** physical entity marking methods for fiber labeling are bulky,easily confused,and,most importantly,the label information can be accessed easily by all potential *** work proposes an encrypted optical fiber tag based on an encoded fiber Bragg grating(FBG)array that is fabricated using a point-by-point femtosecond laser pulse chain inscription *** with different resonant wavelengths and reflectivities are realized by adjusting the grating period and the refractive index *** is demonstrated that a binary data sequence carried by a fiber tag can be inscribed into the fiber core in the form of an FBG array,and the tag data can be encrypted through appropriate design of the spatial distributions of the FBGs with various reflection wavelengths and *** proposed fiber tag technology can be used for applications in port identification,encrypted data storage,and transmission in fiber networks.

关键词： fiber Bragg grating femtosecond laser micromachining encrypted information optical fiber tag

Review of Femtosecond-Laser-Inscribed Fiber Bragg Gratings:Fabrication Technologies and sensing Applications

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photonic Sensors 2021年第2期11卷 203-226页

作者： Jun HE Baijie XU Xizhen XU Changrui LIAO Yiping WANG key laboratory of Optoelectronic devices and systems of Ministry of Education/Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China shenzhen key laboratory of photonic devices and sensing systems far internet of things Guangdong and Hong Kong Joint Research Centre for Optical Fibre SensorsShenzhen UniversityShenzhen 518060China

Fiber Bragg grating(FBG)is the most widely used optical fiber sensor due to its compact size,high sensitivity,and easiness for *** FBGs fabricated by using an ultraviolet(UV)laser phase-mask method require the sensitization of the optical fiber and could not be used at high ***,the fabrication of FBGs by using a femtosecond laser has attracted extensive interests due to its excellent flexibility in creating FBGs array or special FBGs with complex *** femtosecond laser could also be used for inscribing various FBGs on almost all fiber types,even fibers without any *** femtosecond-laser-induced FBGs exhibit excellent thermal stability,which is suitable for sensing in harsh *** this review,we present the historical developments and recent advances in the fabrication technologies and sensing applications of femtosecond-laser-inscribed ***,the mechanism of femtosecond-laser-induced material modification is *** then,three different fabrication tech no logies,i.e.,femtosecond laser phase mask technology,femtosecond laser holographic interferometry,and femtosecond laser direct writing technology,are ***,the advances in high-temperature sensing applications and vector bending sensing applications of various femtosecond-laser-inscribed FBGs are *** femtosecond-laser-inscribed FBGs are promising in many industrial areas,such as aerospace vehicles,nuclear plants,oil and gas explorations,and advanced robotics in harsh environments.

关键词： Fiber Bragg grating(FBG) femtosecond laser high temperature sensor vector bending sensor

A Probe-Shaped Sensor With FBG and Fiber-Tip Bubble for Pressure and Temperature sensing

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photonic Sensors 2021年第4期11卷 411-417页

作者： Bonan LIU Junxian LUO Shen LIU Yanping CHEN Bo HUANG Changrui LIAO Yiping WANG shenzhen key laboratory of photonic devices and sensing systems for internet of things College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors Shenzhen UniversityShenzhen 518060China

A probe-shaped sensor for simultaneous temperature and pressure measurement was reported in this *** effective length of the sensor was〜2 mm,consisting of a fiber Bragg grating(FBG)and a Fabry-Perot interferometer(FPI)with a nano silica *** response sensitivities of the sensor for pressure and temperature were measured as-0.98 nm/MPa and 11.10pm/℃,*** sensor had an extremely low cross-sensitivity between pressure and temperature,which provided a significant potential in dual-parameter sensing.

关键词： Fabry-Perot interferometer fiber Bragg grating fiber optics sensors

Study of Temporal Thermal Response of Microfiber Bragg Grating

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photonic Sensors 2021年第4期11卷 387-391页

作者： Changrui LIAO Tianhang YANG Jinli HAN shenzhen key laboratory of photonic devices and sensing systems for internet of things College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors Shenzhen UniversityShenzhen 518060China

Fiber Bragg grating has been successfully fabricated in the silica microfiber by the use of femtosecond laser point-by-point *** thermal response of the fabricated silica microfiber Bragg grating has been measured by the use of the CO_(2) laser thermal excitation method,and the result shows that the time constant of the microfiber Bragg grating is reduced by an order of magnitude compared with the traditional single-mode fiber Bragg grating and the measured time constant is〜21 ms.

关键词： Fiber optics sensors fiber optics and optical communications fiber optics components

Microstructured Cantilever Probe on Optical Fiber Tip for Microforce Sensor

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photonic Sensors 2024年第2期14卷 89-99页

作者： Famei WANG Changrui LIAO Mengqiang ZOU Dejun LIU Haoqiang HUANG Chao LIU Yiping WANG shenzhen key laboratory of Ultrafast Laser Micro/Nano Manufacturing Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China shenzhen key laboratory of photonic devices and sensing systems for internet of things Guangdong and Hong Kong Joint Research Centre for Optical Fibre SensorsState Key Laboratory of Radio Frequency Heterogeneous IntegrationShenzhen UniversityShenzhen 518060China School of Electronics Science Northeast Petroleum UniversityDaqing 163318China

Benefiting from the great advances of the femtosecond laser two-photon polymerization(TPP)technology,customized microcantilever probes can be accurately 3-dimensional(3D)manufactured at the nanoscale size and thus have exhibited considerable potentials in the fields of microforce,micro-vibration,and microforce *** this work,a controllable microstructured cantilever probe on an optical fiber tip for microforce detection is demonstrated both theoretically and *** static performances of the probe are firstly investigated based on the finite element method(FEM),which provides the basis for the structural *** proposed cantilever probe is then 3D printed by means of the TPP *** experimental results show that the elastic constant k of the proposed cantilever probe can be actively tuned from 2.46N/m to 62.35N/*** force sensitivity is 2.5nm/μN,the Q-factor is 368.93,and the detection limit is ***,the mechanical properties of the cantilever probe can be flexibly adjusted by the geometric configuration of the ***,it has an enormous potential for matching the mechanical properties of biological samples in the direct contact mode.

关键词： Optical fiber sensor microforce sensing microstructured cantilever two-photon polymerization

Design and realization of 3D printed fiber-tip microcantilever probes applied to hydrogen sensing

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Light(Advanced Manufacturing) 2022年第1期3卷 71-81页

作者： Changrui Liao Cong Xiong Jinlai Zhao Mengqiang Zou Yuanyuan Zhao Bozhe Li Peng Ji Zhihao Cai Zongsong Gan Ying Wang Yiping Wang key laboratory of Optoelectronic devices and systems of Ministry of Education/Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China shenzhen key laboratory of photonic devices and sensing systems for internet of things Guangdong and Hong Kong Joint Research Centre for Optical Fibre SensorsShenzhen UniversityShenzhen 518060China College of Materials Science and Engineering Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsShenzhen 518060China Wuhan National laboratory for Optoelectronics(WNLO) Huazhong University of Science and Technology(HUST)Wuhan 430074China shenzhen Huazhong University of Science and Technology Research Institute Shenzhen518057China.

Cantilevers in microelectromechanical systems have the advantages of non-labeling,real-time detection,positioning,and *** solid,rectangular hollow,and triangular microcantilevers were fabricated on an optical fiber tip via two-photon *** mechanical properties were characterized using finite element *** the microcantilever with a palladium film enabled high sensitivity and rapid hydrogen *** shape of the cantilever determines the sensitivity,whereas the thickness of the palladium film determines the response *** microelectromechanical systems can be realized via polymerization combined with optical fibers.

关键词： two-photon polymerization optical fiber sensor Fabry-Pérot interferometer microcantilever probe hydrogen detection

An AuNPs/Mesoporous NiO/Nickel Foam Nanocomposite as a Miniaturized Electrode for Heavy Metal Detection in Groundwater

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Engineering 2023年第8期27卷 199-208页

作者： Boyuan Xue Qian Yang Kaidong Xia Zhihong Li George Y.Chen Dayi Zhang Xiaohong Zhou State key Joint laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China National key laboratory of Science and Technology on Micro/Nano Fabrication Institute of MicroelectronicsPeking UniversityBeijing 100871China shenzhen key laboratory of photonic devices and sensing systems for internet of things Guangdong and Hong Kong Joint Research Centre for Optical Fiber SensorsShenzhen UniversityShenzhen 518060China College of New Energy and Environment Jilin UniversityChangchun 130021China The Research Institute of Environmental Innovation(Suzhou) Tsinghua UniversitySuzhou 215000China

Heavy metals,notably Pb2+and Cu^(2+),are some of the most persistent contaminants found in *** monitoring of these metals,which relies on efficient,sensitive,cost-effective,and reliable methods,is a *** present a nanocomposite-based miniaturized electrode for the concurrent measurement of Pb2+and Cu^(2+)by exploiting the electroanalytical technique of square wave *** also propose a facile in situ hydrothermal calcination method to directly grow binder-free mesoporous Ni O on a three-dimensional nickel foam,which is then electrochemically seeded with gold nanoparticles(Au NPs).The meticulous design of a low-barrier Ohmic contact between mesoporous Ni O and Au NPs facilitates target-mediated nanochannel-confined electron transfer within mesoporous Ni *** a result,the heavy metals Pb2+(0.020 mg.L^(-1)detection limit;2.0–16.0 mg.L^(-1)detection range)and Cu^(2+)(0.013 mg.L^(-1)detection limit;0.4–12.8 mg.L^(-1)detection range)can be detected simultaneously with high ***,other heavy metal ions and common interfering ions found in groundwater showed negligible impacts on the electrode’s performance,and the recovery rate of groundwater samples varied between 96.3%±2.1%and 109.4%±0.6%.The compactness,flexible shape,low power consumption,and ability to remotely operate our electrode pave the way for onsite detection of heavy metals in groundwater,thereby demonstrating the potential to revolutionize the field of environmental monitoring.

关键词： AuNPs Mesoporous NiO Miniaturized electrode Heavy metal ions Groundwater Square wave voltammetry