Results 11 to 20 of about 25,986 (259)
Nature Communications, 2021 Optoacoustic sensing applications are limited by weak electrostrictive force. Here, the authors induce photothermally acoustic vibrations with a focused pulsed laser, and via scanning demonstrate sensing of acoustic impedance at 10 µm spatial resolution,
Yizhi Liang +4 more
doaj +1 more source
Ultra-low-loss anti-resonant hollow-core fiber with nested concentric circle structures
Results in Physics, 2022 In this paper, a novel nested concentric circle anti-resonant hollow-core fiber with double-layer cladding structure and an outer cladding ring is proposed. By optimizing the structural parameter of the novel fiber, its confinement loss reaches 0.0001 dB/
Xingtao Zhao +4 more
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Dosimetric Application of Phosphorus Doped Fibre for X-ray and Proton Therapy
Sensors, 2021 Phosphorous-doped silica optical fibres with a core diameter of 4 µm were tested in X-ray and proton fields for application in cancer therapy dosimetry.
Olugbenga J. Olusoji +7 more
doaj +1 more source
Genetic-optimised aperiodic code for distributed optical fibre sensors [PDF]
Nature Communications, 2020 Luc Thévenaz +2 more
exaly +2 more sources
Nonlinear Hydraulic Pressure Response of an Improved Fiber Tip Interferometric High-Pressure Sensor
Sensors, 2020 We demonstrate a silica diaphragm-based fiber tip Fabry–Perot interferometer (FPI) for high-pressure (40 MPa) sensing. By using a fiber tip polishing technique, the thickness of the silica diaphragm could be precisely controlled and the pressure ...
Wei Huang +7 more
doaj +1 more source
A High-Strength Strain Sensor Based on a Reshaped Micro-Air-Cavity
Sensors, 2020 We demonstrate a high-strength strain sensor based on a micro-air-cavity reshaped through repeating arc discharge. The strain sensor has a micro-scale cavity, approximate plane reflection, and large wall thickness, contributing to a broad free spectrum ...
Yanping Chen +7 more
doaj +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 +7 more
doaj +1 more source
Recent Improvement of Medical Optical Fibre Pressure and Temperature Sensors
Biosensors, 2015 This investigation describes a detailed analysis of the fabrication and testing of optical fibre pressure and temperature sensors (OFPTS). The optical sensor of this research is based on an extrinsic Fabry–Perot interferometer (EFPI) with integrated ...
Sven Poeggel +7 more
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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 +5 more
doaj +1 more source
Sensors, 2018 In this paper, a hybrid sensor was fabricated using a IR-femtosecond laser to measure the thermal expansion and thermo-optical coefficient of silica-based fiber Bragg gratings (FBGs).
Litong Li +4 more
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