Recent progress in Brillouin based fiber sensor technology correlation-based continuous-wave technique

2003 ◽  
Author(s):  
K. Hotate
Keyword(s):  
Recent Progress ◽  
Continuous Wave ◽  
Fiber Sensor ◽  
Sensor Technology ◽  
Wave Technique

scholarly journals Special Section Guest Editorial: Optical Fiber Sensor Technology

2019 ◽  
Vol 58 (07) ◽  
pp. 1
Author(s):  
Gary A. Miller ◽  
Stavros Pissadakis ◽  
Ping Lu
Keyword(s):  
Optical Fiber ◽  
Guest Editorial ◽  
Special Section ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Sensor Technology

Frequency modulated continuous wave technique for referencing and multiplexing intensity based fibre optic sensors

2008 ◽  
Author(s):  
R. A. Perez-Herrera ◽  
D. A. Pereira ◽  
O. Frazão ◽  
J. M. Castro Ferreira ◽  
J. L. Santos ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Fibre Optic ◽  
Wave Technique

The Measure Technology of the Structure Stress during the Weighing Process of the Large Structure

2013 ◽  
Vol 838-841 ◽  
pp. 2010-2013
Author(s):  
Shu Min Li
Keyword(s):  
Finite Element Analysis ◽  
Optical Fiber ◽  
Dynamic Stress ◽  
Test Bench ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Sensor Technology ◽  
Large Structure ◽  
Element Analysis ◽  
Key Points

The structure needs to be lifted-off from the ground during the weighing progress. For that the weighing fulcrum and the building fulcrum are different and the building fulcrum is fewer usually and the weighing system has some asynchronism during the lifting process of the structure, it is very important to measure the stress of the key points of the structure during the weighing progress. The paper uses finite element analysis to get the stress sensitive of the weighing device while weighing and uses the optical fiber sensor technology to measure the dynamic stress. Through the experiment with the weighing test bench show that the optical fiber sensor technology has a clear advantage to the traditional resistance strain gauge technique.

scholarly journals Ionic Transport Properties of P2O5-SiO2 Glassy Protonic Composites Doped with Polymer and Inorganic Titanium-based Fillers

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3004
Author(s):  
Maciej Siekierski ◽  
Maja Mroczkowska-Szerszeń ◽  
Rafał Letmanowski ◽  
Dariusz Zabost ◽  
Michał Piszcz ◽  
...  
Keyword(s):  
Transport Properties ◽  
Continuous Wave ◽  
Electrochemical Impedance ◽  
Pore Space ◽  
Poly Vinyl Alcohol ◽  
Proton Mobility ◽  
Polymeric Additives ◽  
Wave Technique ◽  
Poly Ethylene

This paper is focused on the determination of the physicochemical properties of a composite inorganic–organic modified membrane. The electrical conductivity of a family of glassy protonic electrolytes defined by the general formula (P2O5)x(SiO2)y, where x/y is 3/7 are studied by Alternating Current electrochemical impedance spectroscopy (AC EIS) method. The reference glass was doped with polymeric additives—poly(ethylene oxide) (PEO) and poly(vinyl alcohol) (PVA), and additionally with a titanium-oxide-based filler. Special attention was paid to determination of the transport properties of the materials thus modified in relation to the charge transfer phenomena occurring within them. The electrical conductivities of the ‘dry’ material ranged from 10−4 to 10−9 S/cm, whereas for ‘wet’ samples the values were ~10−3 S/cm. The additives also modified the pore space of the samples. The pore distribution and specific surface of the modified glassy systems exhibited variation with changes in electrolyte chemical composition. The mechanical properties of the samples were also examined. The Young’s modulus and Poisson’s ratio were determined by the continuous wave technique (CWT). Based on analysis of the dispersion of the dielectric losses, it was found that the composite samples exhibit mixed-type proton mobility with contributions related to both the bulk of the material and the surface of the pore space.

scholarly journals Recent Progress in Two-Dimensional Nanomaterials for Laser Protection

Chemistry ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 17-43 ◽  
Author(s):  
Zhiwei Liu ◽  
Bin Zhang ◽  
Yu Chen
Keyword(s):  
Laser Physics ◽  
Recent Progress ◽  
Continuous Wave ◽  
Two Dimensional ◽  
Relaxation Dynamics ◽  
Daily Lives ◽  
Carrier Relaxation ◽  
Optical Instruments ◽  
2D Nanomaterials ◽  
Human Eyes

The Nobel Prize in Physics 2018, “For groundbreaking inventions in the field of laser physics”, went to Arthur Ashkin and Gérard Mourou and Donna Strickland. Their inventions have revolutionized laser physics and greatly promoted the development of laser instruments, which have penetrated into many aspects of people’s daily lives. However, for the purpose of protecting human eyes or optical instruments from being damaged by both pulsed and continuous wave laser radiation, the research on laser protective materials is of particular significance. Due to the intriguing and outstanding physical, chemical, and structural properties, two-dimensional (2D) nanomaterials have been extensively studied as optical limiting (OL) materials owing to their broadband nonlinear optical (NLO) response and fast carrier relaxation dynamics that are important for reducing the laser intensity. This review systematically describes the OL mechanisms and the recent progress in 2D nanomaterials for laser protection.

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