Results 51 to 60 of about 7,750 (233)

High-speed interferometric FBG interrogator with dynamic and absolute wavelength measurement capability [PDF]

, 2013
A passive, interferometric wavelength demodulation technique has been extended to measure the absolute wavelengths of a multiplexed array of fiber Bragg grating sensors. The scheme retains its original strain resolution of 10 nε/√{Hz}. A proof-of-concept
Perry, Marcus, Niewczas, Pawel, Johnston, Michael, Orr, Philip   +3 more
core   +1 more source

Liquid Metal‐Based Stretchable Strain Sensor for Fruit Growth Monitoring

Advanced Materials Technologies, EarlyView.
Schematic overview of the fruit growth sensor development workflow, including sensor fabrication by injection molding, electromechanical and environmental characterization, mechanical stability testing, electronic readout integration, and outdoor field validation for monitoring of fruit growth under practical orchard conditions.
Asad Ullah, Lennert Purnal, Maximilian Krack, Sander Vijgen, Thijs Vandenryt, Dieter Reenaers, Ronald Thoelen, Wim Deferme   +7 more
wiley   +1 more source

FBG optimization using spline encoded evolution strategy

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper presents an encoding scheme adapted for Fiber Bragg Grating (FBG) optimization using metaheuristics. The proposed encoding scheme uses spline approximations in order to build softened refractive index profiles from few encoded parameters. This
M. J. de Sousa, J. C. W. A. Costa, R. M. de Souza, R. V. M. P. Pantoja   +3 more
doaj   +1 more source

Point-by-Point Femtosecond-Laser Inscription of 2-μm-Wavelength-Band FBG Through Fiber Coating

IEEE Photonics Journal, 2019
We propose a point-by-point inscription method for fiber Bragg grating (FBG) fabrication using a femtosecond pulsed laser focused through a fiber polyimide coating, realizing a 2-μm-wavelength-band FBG.
Wei He, Lianqing Zhu, Wen Zhang, Feng Liu, Mingli Dong   +4 more
doaj   +1 more source

Tunable Random Fiber Laser Based on Dual-Grating Structure

Photonics, 2023
In order to reduce the pumping threshold and achieve a short-cavity single-mode transmission with a narrow-linewidth random fiber laser, we propose a tunable random fiber laser based on the combination of random grating and highly reflective fiber Bragg ...
Yanan Niu, Pinggang Jia, Jianhui Su, Jingyi Wang, Guowen An, Qianyu Ren, Jijun Xiong   +6 more
doaj   +1 more source

A Review on Sensor Technologies, Control Approaches, and Emerging Challenges in Soft Robotics

Advanced Robotics Research, EarlyView.
This review provides an introspective of sensors and controllers in soft robotics. Initially describing the current sensing methods, then moving on to the control methods utilized, and finally ending with challenges and future directions in soft robotics focusing on the material innovations, sensor fusion, and embedded intelligence for sensors and ...
Ean Lovett, Maxwell Hammond, Niloufar Seyfi, Amirreza Fahim Golestaneh, Venanzio Cichella, Caterina Lamuta   +5 more
wiley   +1 more source

A fibre Bragg grating based inclinometer system for ground movement measurement [PDF]

, 2010
The measurement of ground movement is an essential part of many geotechnical engineering operations. For decades, inclinometer systems have traditionally been used for this purpose to provide crucial information to engineers and researchers.
Ricardo Correia, Staines, Stephen E., Stephen Staines, Ralph P. Tatam, Tatam, Ralph P., Chehura, Edmon, Correia, Ricardo N., James, Stephen W., Stephen W. James, Li, Jin, Jin Li, Edmond Chehura   +11 more
core   +1 more source

X-ray Writing of Fiber Bragg Gratings (FBGs)

, 2020
Fabrication of nanoscale optical Fiber Bragg Gratings (FBGs) is one of the key manufacturing processes for fiber optics, which has many important applications in data communication and distributed remote sensing at a distance up to hundreds of kms. However, the fabrication of the FBGs is challenging.
openaire   +2 more sources

Cross‐Scale Hierarchical Targeted Delivery System Based on Small‐Scale Magnetic Robots

Advanced Robotics Research, EarlyView.
This article reviews a cross‐scale hierarchical targeted delivery system that integrates magnetic continuum robots and magnetic microrobots. By combining rapid long‐range navigation with precise microscale targeting, the system overcomes key limitations of single‐scale approaches.
Junjian Zhou, Zhiqiang Chen, Yuanbiao Ma, Zhiqiang Tang, Qianqian Wang   +4 more
wiley   +1 more source

Thin bonding wires temperature measurement using optical fiber sensors [PDF]

, 2011
In this work we demonstrate the use of optical fiber sensors to measure temperature in thin metallic bonding wires. Temperature was measured in copper wires with diameter of 0.10, 0.28, 0.60 and 0.70 mm and for different values of the driven electrical ...
P. Antunes, Varum, Humberto, P.S. André, Varum, H., Andre, Paulo, Lima, Hugo, Rocha, A. M., H. Lima, A.M. Rocha, Rocha, Ana, Lima, H., Antunes, P., Antunes, Paulo, H. Varum, André, P. S.   +14 more
core   +2 more sources