Article
Construction & Building Technology
Vasantha Ramani, Kevin Sze Chiang Kuang
Summary: This study presents a method for monitoring the damage induced by corrosion of steel in concrete using a lens-based plastic optical fiber (LPOF) strain sensor. The sensor shows promising results for detecting corrosion and estimating the extent of damage during the corrosion of rebar. The research results indicate that it is feasible to monitor concrete structures for damage due to flexural loading and corrosion of rebar using an intensity-based LPOF strain sensor.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Manyu Liu, Fan Zhang, Cong Xu, Zhu Ma, Shunshun Zhong, Ji'an Duan
Summary: An experimental and theoretical study is conducted on an optical coupling system consisting of a laser diode, aspherical lens, and GRIN fiber. The effects of various factors on coupling efficiency are systematically investigated, and the study provides insights on optimizing the launch optics for designing and fabricating GRIN fiber coupled packaging of optoelectronic devices.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Juan David Lopez, Alex Dante, Regina Celia da Silva Allil, Marcelo Martins Werneck
Summary: This work presents a comparative study on the influence of the geometric shape of plastic optical fiber (POF) sensors in their response to refractive index (RI) of external media. Simulation results showed that POF sensors with additional curves had higher sensitivities compared to the simple U-shaped sensor, and the sensor with two additional curves exhibited the highest sensitivity. Experimental results confirmed the improvement in sensitivity achieved through small modifications in the shape design. This research demonstrates the significance of shape design in enhancing the performance of RI-based sensors.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Camilo Quintans Grana, Maria Dolores Valdes Pena, Ana Maria Cao y Paz, Maria Jose Moure Rodriguez, Jorge Marcos Acevedo
Summary: In measurement systems, it is crucial to obtain both the calibration curve and its associated uncertainty for the entire operating range. Different methods should be considered based on the characteristics of the measurement and nature of the experiments. This study presents a step-by-step procedure to simultaneously obtain calibration and uncertainty curves, using MLE, WLS, and ISO-28037 recommendations, as demonstrated in the calibration of a U-Bent plastic optical fiber sensor measuring sucrose solution density related to RI.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Materials Science, Multidisciplinary
G. Anwer, B. Acherjee
Summary: Laser transmission welding is a method for joining polymers and hybrid structures. It has significant applications in medical equipment, electronics, and other fields. Recent research has developed various LTW techniques, including clear welding and absorber-free welding. The study also focuses on the mechanical and morphological characteristics of the welds and the simulation of the LTW process.
LASERS IN ENGINEERING
(2022)
Article
Optics
Sekip Esat Hayber
Summary: This study focuses on the analytical and experimental research of the optical power loss characteristics of V-grooved polymer optical fibers (POFs). A mathematical model is developed using geometric optic approaches to determine the optical output power and loss in V-grooved structures based on groove angle and depth. The effects of groove parameters and fiber diameter on optical output power are analyzed, and a low-cost and efficient groove fabrication process is performed to create V-grooves on POFs. The experimental results confirm the compatibility of the behavior with the analytical results and establish the accuracy of estimating the output power for V-groove POF structures.
Article
Chemistry, Analytical
Wu Zhang, Yanxiao Lin, Yusong Gao, Zekai Guo, Xiangling Li, Yuhong Hu, Pengcai Dong, Qifan Zhang, Xiaohui Fang, Meng Zhang
Summary: This study numerically and experimentally investigated optical trapping on a microsphere using an axicon lensed fiber (ALF). The results show that the microsphere can be effectively trapped by fibers with different tapered lengths and incident light at different wavelengths. Experimental demonstration of optical trapping on polystyrene microspheres in a microfluidic channel was also conducted, and the corresponding optical forces were derived based on fluid flow speed. This study provides guidance for future design of tapered fibers for optical trapping of microspheres.
Article
Optics
Foram Dave, Muhammad Mahmood Ali, Mozaffar Mokhtari, Richard Sherlock, Alistair McIlhagger, David Tormey
Summary: This study defines the laser process window and welding suitability of neat isotactic polypropylene (iPP) and its carbon black composites for laser transmission welding (LTW) using thermal characterization and simulation. The study emphasizes the importance of crystallinity in defining weld integrity and quality and proposes mathematical models for welding feasibility.
OPTICS AND LASER TECHNOLOGY
(2022)
Review
Optics
Bappa Acherjee
Summary: Laser transmission welding (LTW) offers superior weld quality and cost-efficiency, with process capability depending on material properties, process parameters, and laser irradiation strategies. Various laser irradiation and application strategies have been developed and implemented, catering to different welding profiles and production environments.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Yuto Hirai, Yutaka Suzuki, Masayuki Morisawa
Summary: Humidity is an important indicator used in many fields, so the technology for its measurement is significant. We studied humidity sensors using a swellable polymer as the cladding material of plastic optical fibers (POFs). By changing the incident light from a single wavelength to two wavelengths and using dye doping, a humidity sensor with high sensitivity and an RH detection range of 10%-90% can be developed.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Luis Pereira, Carlos Marques, Rui Min, Getinet Woyessa, Ole Bang, Humberto Varum, Paulo Fernando da Costa Antunes
Summary: This study presents the first inscription of fiber Bragg gratings (FBGs) in ZEONEX-480R microstructured polymer optical fiber (POF) using the fourth harmonic (266 nm) of a Nd:YAG laser system. The gratings were produced in 270-mu m diameter POF samples connectorized with ferrule connectors (FCs) using the phase mask method. The results demonstrate good stability and performance of the gratings in this polymer fiber, indicating potential cost-effective solutions.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Alicja Anuszkiewicz, Marcin Franczyk, Dariusz Pysz, Filip Wlodarczyk, Adam Filipkowski, Ryszard Buczynski, Tomasz Osuch
Summary: We have developed a silica-based large mode area fiber with a nanostructured core for use in fiber laser cavities. Our experimental results demonstrate that the fiber operates in single mode with low bending loss. We have also successfully fabricated high reflectivity UV induced fiber Bragg gratings and utilized them in a fiber laser setup. The flexibility of the nanostructuring approach holds promise for the development of passive fiber components that can be matched with any type of active fibers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Mohd Ashraf, Mainuddin, Mirza Tariq Beg, Fiza Moin, Raghvan Rajesh, Gaurav Singhal
Summary: This article discusses the sensitivity enhancement in U-shaped evanescent wave fiber optic sensor (EWFS). The study examines the impact of surface roughness, material deformation, and probe geometry on the overall sensitivity of U-shaped fiber optic EWFS. Experimental results demonstrate that rough-surfaced fiber probes show a 7% enhancement in sensitivity compared to smooth fiber probes.
IEEE SENSORS JOURNAL
(2023)
Article
Computer Science, Information Systems
Shuang Wang, Bin Liu, Yu-Lin Wang, Yingying Hu, Juan Liu, Xing-Dao He, Jinhui Yuan, Qiang Wu
Summary: This research proposes a wearable plastic-optical-fiber sensing system based on machine learning for human motion recognition. By monitoring joint positions, it can accurately identify six types of human movements. This system has great applications in human motion recognition and AR/VR.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Yifan Ye, Changjian Zhao, Zhuo Wang, Chuanxin Teng, Carlos Marques, Rui Min
Summary: This article presents a low-cost method for fabricating plastic optical fiber (POF) liquid-level and refractive index (RI) sensors integrated with smartphones. These sensors can be used to monitor real-time liquid level and RI, especially in portable and illuminated situations. By drilling microholes in side-growing POFs (SGPOFs) with high-temperature metal wire, the change in RI around the microholes enables the measurement of liquid level and RI by measuring the change in light intensity transmitted in the fiber. Experimental results show good agreement with theoretical values, with a liquid-level sensitivity of 0.29%/cm +/- 0.02%/cm for water with an RI of 1.333, and an RI sensitivity of -22.8%/RIU +/- 0.6%/RIU in the measurement range from 1.333 to 1.475.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Chun-Nien Liu, Jhuo-Wei Li, Yung-Hsiang Tung, Chun-Chuen Yang, Wei-Chih Cheng, Sheng-Lung Huang, Wood-Hi Cheng
IEEE PHOTONICS JOURNAL
(2020)
Article
Optics
Hsing-Kun Shih, Chun-Nien Liu, Wei-Chih Cheng, Wood-Hi Cheng
Article
Engineering, Electrical & Electronic
Silvano Donati, Giuseppe Martini, Zingway Pei, Wood-Hi Cheng
Summary: In this study, the ultimate timing error in LiDAR operation using time-of-flight measurement is analyzed, with systematic error becoming dominant at large number of detected photons. However, this systematic error can be canceled out by a separate measurement of the number of photons.
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2021)
Article
Optics
Yung-Peng Chang, Hsing-Kun Shih, Chun-Nien Liu, Hsin-An Chen, Stark Tsai, Kenneth Li, Pin Han, Wood-Hi Cheng
Summary: A novel laser-assisted LED system for adaptive-driving-beam headlights utilizes an ultra-reliable Ce3+: YAG-based single crystal phosphor (SCP) layer, resulting in improved field of view and brightness for the ADB. The high-beam pattern meets regulations and extends illumination distance up to 200 meters.
Article
Engineering, Electrical & Electronic
Hsing-Kun Shih, Chun-Nien Liu, Wei-Chih Cheng, Wood-Hi Cheng
Summary: The high CRI and wide CCT range of WLEDs were achieved using a wet-type cold isostatic pressing technique, which relied on optimized phosphor materials and precise adjustment of PiG thickness.
IEEE PHOTONICS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Hsing-Kun Shih, Chun-Nien Liu, Wei-Chih Cheng, Wood-Hi Cheng
Summary: In this study, co-doped phosphor-in-glass (PiG) with a suitable selection of red and green phosphors and antireflection coating (ARC) has been demonstrated for high performance white light-emitting diodes (WLEDs). This approach led to improved overall luminous efficiency, higher color rendering index, and reduced amount of phosphor material usage, making it economically viable for high-quality WLED indoor lighting applications.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Hsing-Kun Shih, Yung-Peng Chang, Chun-Nien Liu, Kenneth Li, Wood-Hi Cheng
Summary: This study demonstrates the generation of a laser hotspot in a white LED using a laser-excited single crystal phosphor converter layer, which enables a wide field of view and high brightness for an adaptive-driving-beam headlight. The proposed scheme shows promising performance and is suitable for the next-generation autonomous vehicle applications.
Proceedings Paper
Optics
Kai-Chieh Chang, Wei-Chih Cheng, Chun-Nien Liu, Charles Tu, Tien-Tsorng Shih, Sheng-Lung Huang, Wood-Hi Cheng
Summary: A novel growth technique is used to fabricate smaller 300-nm broadband single-mode Cr-doped crystalline core fibers, achieving a record gain of 11.4 dB. The gain-per-unit-length efficiency of these fibers is much higher than current Er and Bi-doped fibers. The record gain is mainly attributed to the maintenance of a constantly conical molten-zone shape during the growth process, resulting in a smaller core diameter of 15 μm and a longer fiber length of 30 cm.
NEXT-GENERATION OPTICAL COMMUNICATION: COMPONENTS, SUB-SYSTEMS, AND SYSTEMS XI
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Silvano Donati, Giuseppe Martini, Zingway Pei, Wood-Hi Cheng
Summary: In schemes for time-of-flight measurements with rangefinders and LiDARs, random error is influenced by quantum noise of detected photons, while systematic error may be larger than random error. By choosing appropriate parameters, systematic error can be reduced below random error.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
Article
Engineering, Electrical & Electronic
Chun-Nien Liu, Chia-Ming Liu, Sheng-Lung Huang, Wood-Hi Cheng
Summary: In this study, a 11-dB net gain was achieved in a 34-cm fiber length using precise laser-heated pedestal growth and tetrahedral chromium optimization. The significant improvement in net gain in the fiber was directly attributed to Cr4+ optimization. The development of this technology is crucial for practical applications in next-generation broadband fiber amplifier systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Silvano Donati, Wood-Hi Cheng, Chun-Nien Liu, Hsing-Kun Shih, Zingway Pei
Summary: The headlight module presented in the study integrates smart laser headlights and LiDAR technology, achieving over 85% detection accuracy for pedestrians within a 20-meter distance. The module features high conversion efficiency and a good color rendering index, making it an advanced safety technology for vehicles.
Proceedings Paper
Engineering, Electrical & Electronic
Chiu-Ming Liu, Jhuo-Wei Li, Chun-Nien Liu, Wei-Chih Cheng, Charles Tu, Tien-Tsorng Shih, Sheng-Lung Huang, Wood-Hi Cheng
2020 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXPOSITION (OFC)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Chia-Ming Liu, Yann-Horng Chen, Chun-Nien Liu, Sheng-Lung Huang, Charles Tu, Wood-Hi Cheng
2020 OPTO-ELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC 2020)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Hsien Wu, Pei-Hao Tseng, Chun-Nien Liu, Jau-Ji Jou, Wood-Hi Cheng, Yaw-Dung Wu, Po-Jui Chiang, Ting-Jen Hsueh, Tien-Tsorng Shih
2020 IEEE 70TH ELECTRONIC COMPONENTS AND TECHNOLOGY CONFERENCE (ECTC 2020)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Chun-Nien Liu, Yung-Peng Chang, Hsing-Kun Shih, Han Pin, Kenneth Li, Zingway Pei, Silvano Donati, Wood-Hi Cheng
2020 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2020)
Article
Engineering, Multidisciplinary
Junichi Kouguchi, Hayato Yoshioka
Summary: A new monitoring method for milling process using signal analysis of acceleration sensors is proposed in this research, which can solve the difficulty in estimating cutting forces for small diameter tools.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Weijie Wang, Yanling Tian, Zhao Zhang, Zhilai Lu, Fujun Wang, Dawei Zhang
Summary: This paper proposes a comprehensive model for predicting the cutting depth and contact area in nanoscratching. The model takes into account the geometric shape of the indenter and elastic recovery, reducing prediction errors. The study also analyzes the influence of the indenter geometry on the contact area, with the face angle of the pyramid identified as a key factor.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Qiaolin Li, Yuki Shimizu, Xiaohao Wang, Xinghui Li, Wei Gao
Summary: This paper introduces a stitching linear scan method for roundness and diameter measurement of small cylinders, using a ruby ball stylus as hardware filtering to eliminate the influence of high-frequency data. Experimental results show that the repeatability of the ruby ball stylus is better than the diamond stylus.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Chaturaporn Kerdkaew, Surasak Kaewpho, Sakchai Chomkokard, Theera Yaemglin, Ittipon Cheowanish, Noparit Jinuntuya, Wiwat Wongkokua
Summary: A new calibration standard for a CMOS-based autocollimator using an optical angle generator with a submillimeter strip reflector (OAG-SSR) is proposed. This method provides angular values along the measuring range of the autocollimator without any mechanical movement, enabling a faster calibration process, which is suitable for integration with production lines.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Haohao Tao, Tongjie Li, Feng Chen, Jinwei Fan, Ri Pan
Summary: In this paper, a novel OTA method is proposed that considers the relationship between tolerance of machine tools' key parts and volumetric error. A volumetric error prediction model is established based on the bridge between geometric error and tolerance. Additionally, a Processing Simplicity Index (PSI) is introduced to replace manufacturing cost and a tolerance-PSI model is established. An OTA model is formulated to minimize volumetric error and maximize PSI. The feasibility and effectiveness of the method are validated through simulations and experiments.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Xiumin Zhang, Jianhua Liu, Huanxiong Xia, Xiaohui Ao, Jiechen Zhou, Zhihao Fu
Summary: A comprehensive finite-element model was developed in this paper to study the evolution of surface figure in high-precision bonded mirrors. The cure kinetics and mechanical behaviors of the optical adhesive were experimentally examined and modeled, and the effects of environmental factors on the surface-figure accuracy and stability were further investigated.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Peng Wang, Bin Chen, Jian Li, Jianwei Wang, Yingjie Zhang, Kai Feng
Summary: This paper proposes an aerostatic bearing with damper modules to suppress vibration on the bearing surface. The stiffness and damping characteristics can be adjusted by changing the thickness of the sheets, resulting in effective vibration suppression.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Lei Yang, Xiaoguang Guo, Renke Kang, Xianglong Zhu, Yufan Jia, Hao Wang
Summary: This paper develops an analytical model that takes into account the pad surface morphology to predict the evolution of the workpiece surface shape. The model considers the cross-scale relationship between the formation of lapped surface shape and the scratching process of a single abrasive grain. The simulated and experimental results validate the correctness and validity of the model, providing new ideas for controlling the workpiece surface.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Gabriele Piscopo, Alessandro Salmi, Eleonora Atzeni
Summary: This paper proposes an artifact for the LP-DED process and evaluates its dimensional accuracy and geometrical tolerances. The findings show that the tolerances of the LP-DED process are comparable to sand casting, lower than LB-PBF technologies, but similar to EB-PBF technologies.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Liang Xue, Ningsong Qu
Summary: This study focuses on the key issues of improving material removal rate and surface quality in macro-electrolyte jet machining. By introducing a novel tool with the rear-end tilted, the current density of the workpiece surface can be increased, leading to improved machining performance. Experimental results show that the tool with a rear-end tilt angle of 15 degrees significantly enhances the material removal rate and reduces surface roughness compared to the standard tool.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Ping Yang, Kaixin Luo, Runxi Wu
Summary: This article proposes a new calibration device to measure the spatial errors of a six-axis serial robot. The device compensates for errors by modifying angles and identifying stiffness parameters, and experiments verify its effectiveness.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Shilei Wu, Mingxiang Ling, Yingbin Wang, Tao Huang
Summary: This paper studies the electromechanical behavior of elliptical APAs by analyzing the multi-domain dynamics of piezoelectric stacks and compliant mechanisms using a novel electro-mechanical transfer matrix method. An analytical electro-elasto transfer matrix of piezoelectric stacks operating at the d33 mode is derived in the form of Taylor's series. The dynamic response spectrum of displacement and impedance for elliptical APAs is accurately captured by this electro-mechanical model, and different topologies of elliptical APAs are compared to suggest the optimal configuration.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Lei Meng, Yusheng Liu, Ying Yan, Dongming Guo, Ping Zhou
Summary: This study explores electrochemically induced chemical etching (ECICE) as a method to achieve nanogram-level, low-cost, stress-free, and stable material removal of fused quartz. The key factors affecting removal minimum and stability are revealed through modeling analysis and testing. A proposed method achieves precision stable removal with satisfactory results at the nanogram level.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Hong Yao, Hai Bi, Junjie Wei, Shuo Zhan, Fangxin Chen, IEEE
Summary: This paper presents a dual-loop control syringe-based picoliter-scale injection system for high-precision microinjection. The system utilizes an inner pneumatic servo loop and an outer position servo loop to achieve precise control. The experimental results demonstrate that the system can regulate the smallest droplet size to within 0.25 pL.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Jinchun Yuan, Jiasheng Li, Ye Ding
Summary: In this paper, a simple and effective internal model control (IMC) system is proposed to attenuate thrust ripples in ultraprecision air-bearing linear feed systems, based on a modified modeling and identification method of permanent magnet linear synchronous motors (PMLSMs). The performance of the proposed method in overcoming nonlinearity and achieving smooth velocities in steady states is demonstrated through analysis and experiments.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
