Results 11 to 20 of about 559,327 (258)

Recent Improvement of Medical Optical Fibre Pressure and Temperature Sensors

open access: yesBiosensors, 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
doaj   +1 more source

Black Phosphorus for Photonic Integrated Circuits

open access: yesResearch, 2023
Black phosphorus gives several advantages and complementarities over other two-dimensional materials. It has drawn extensive interest owing to its relatively high carrier mobility, wide tunable bandgap, and in-plane anisotropy in recent years.
Mingxin Zhang   +3 more
doaj   +1 more source

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

open access: yesSensors, 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

Chromoionophores in optical ion sensors [PDF]

open access: yes, 1989
The feasibility of surface plasmon resonance (SPR) for ion sensing has been investigated. Emphasis is laid on a simulation-based optimization of the SP carrying structure, as well as the applicability of a specific chemo—optical interface we have ...
Gent, J. van   +6 more
core   +2 more sources

Optimization of Pinned Photodiode Pixels for High-Speed Time of Flight Applications

open access: yesIEEE Journal of the Electron Devices Society, 2018
We discuss optimizations of pinned photodiode (PPD) pixels for indirect time of flight sensors. We focus on the transfer-gate and dumping gate regions optimization, on the PPD dimension and shape to assure fast lateral charge transfer and on the ...
Fabio Acerbi   +7 more
doaj   +1 more source

Ultra-Broadband Subwavelength Grating Coupler for Bound State in Continuum

open access: yesIEEE 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   +6 more
doaj   +1 more source

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

open access: yesSensors, 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   +5 more
doaj   +1 more source

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

open access: yesBiosensors, 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

In-situ monitoring for CVD processes [PDF]

open access: yes, 2002
Aiming towards process control of industrial high yield/high volume CVD reactors, the potential of optical sensors as a monitoring tool has been explored.
A. Beil   +14 more
core   +3 more sources

Monolithic Integration of a Plasmonic Sensor with CMOS Technology [PDF]

open access: yes, 2017
Monolithic integration of nanophotonic sensors with CMOS detectors can transform the laboratory based nanophotonic sensors into practical devices with a range of applications in everyday life.
Al-Rawhani, Mohammed   +9 more
core   +1 more source

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