Results 21 to 30 of about 3,683,812 (293)

Roadmap on optical sensors [PDF]

Journal of Optics, 2017
Abstract Sensors are devices or systems able to detect, measure and convert magnitudes from any domain to an electrical one. Using light as a probe for optical sensing is one of the most efficient approaches for this purpose. The history of optical sensing using some methods based on absorbance, emissive and florescence properties ...
Ferreira, M.F.S., Castro-Camus, E., Ottaway, D.J., López-Higuera, J.M., Feng, X., Jin, W., Jeong, Y., Picqué, N., Tong, L., Reinhard, B.M., Pellegrino, P.M., Méndez, A., Diem, M., Vollmer, F., Quan, Q.   +14 more
openaire   +4 more sources

An Experimental Study of the Effects of External Physiological Parameters on the Photoplethysmography Signals in the Context of Local Blood Pressure (Hydrostatic Pressure Changes)

Sensors, 2017
A comprehensive study of the effect of a wide range of controlled human subject motion on Photoplethysmographic signals is reported. The investigation includes testing of two separate groups of 5 and 18 subjects who were asked to undertake set exercises ...
Hongwei Yuan, Sven Poeggel, Thomas Newe, Elfed Lewis, Charusluk Viphavakit, Gabriel Leen   +5 more
doaj   +1 more source

Ultra-Broadband Subwavelength Grating Coupler for Bound State in Continuum

IEEE Photonics Journal, 2022
Grating couplers (GCs) are important for light to couple between optical fibers and photonic integrated circuits (PICs). The Bound State in Continuum (BIC) waveguides offer new functionalities for PIC.
Junjia Wang, Chongbao Fang, Na Dong, Weifeng Jiang, Zhaofu Chen, Lawrence R. Chen, Xiaohan Sun   +6 more
doaj   +1 more source

Multiplexing a serial array of tapered optical fibre sensors using coherent optical frequency domain reflectometry [PDF]

, 2012
The use of high spatial resolution optical frequency domain reflectometry (OFDR) to facilitate the multiplexing of a serial array of tapered optical fibre sensors is presented.
Tatam, Ralph P., Chehura, Edmon, James, Stephen W., Jarzebinska, Renata   +3 more
core   +1 more source

High-Efficiency Inscription of Fiber Bragg Grating Array with High-Energy Nanosecond-Pulsed Laser Talbot Interferometer

Sensors, 2020
A high-energy nanosecond-pulsed ultraviolet (UV) laser Talbot interferometer for high-efficiency, mass production of fiber Bragg grating (FBG) array was experimentally demonstrated.
Zhe Zhang, Baijie Xu, Jun He, Maoxiang Hou, Weijia Bao, Yiping Wang   +5 more
doaj   +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   +1 more source

Measurement of Interfacial Adhesion Force with a 3D-Printed Fiber-Tip Microforce Sensor

Biosensors, 2022
With the current trend of device miniaturization, the measurement and control of interfacial adhesion forces are increasingly important in fields such as biomechanics and cell biology.
Mengqiang Zou, Changrui Liao, Yanping Chen, Zongsong Gan, Shen Liu, Dejun Liu, Li Liu, Yiping Wang   +7 more
doaj   +1 more source

Calibrating-free Portable Magnetoelastic Device for Accurate Detection of Anti-CSFV-E2 in Porcine Serum

Taiyuan Ligong Daxue xuebao, 2023
Purposes Error calibration between equipment manufacturing has become a practical challenge for various inspection methods. Methods In this paper, a portable magnetoelastic (ME) biodetection device is proposed for calibration-free detection of classical ...
Xing GUO, Man LUO, Jianru HOU, Yuchao LI, Shuhua WANG, Xiaoliang CHENG, Aoqun JIAN, Zhongyun YUAN, Shengbo SANG   +8 more
doaj   +1 more source

Liquid-Crystal-Filled Side-hole Fiber for High-Sensitivity Temperature and Electric Field Measurement

Micromachines, 2019
We propose a highly sensitive sensor based on a nematic liquid-crystal-filled side-hole fiber. The liquid crystal is precisely filled into an air hole of the optical fiber using a method of manually gluing in the fusion splicer.
Yijian Huang, Ying Wang, Chun Mao, Jingru Wang, Han Wu, Changrui Liao, Yiping Wang   +6 more
doaj   +1 more source

GaN laser technology for cold-atom quantum sensors and optical atomic clocks

, 2022
Paper SW4I.4We report on GaN lasers with extremely narrow linewidth (~1MHz) at âmagic wavelengthsâ for cold-atom quantum sensors and optical atomic clocks, using extended cavity GaN laser diodes and DFB GaN laser ...
Macarthur, J., Gwyn, S., McKnight, L., Haji, M., Suski, T., Leszczynski, M., Najda, S.P., Kelly, A.E., Slight, T., Schiavon, D., Perlin, P., Stanczyk, S., Watson, S., Knapp, M.   +13 more
core   +1 more source