Results 11 to 20 of about 325 (215)

Recent Advances in High-Birefringence Fiber Loop Mirror Sensors

open access: yesSensors, 2007
Recent advances in devices and applications of high-birefringence fiber loopmirror sensors are addressed. In optical sensing, these devices may be used as strain andtemperature sensors, in a separate or in a simultaneous measurement.
José L. Santos   +2 more
doaj   +1 more source

Zero-birefringence pressure-sensitive adhesives

open access: yesAIP Advances, 2012
We have developed zero-birefringence pressure-sensitive adhesives (PSAs) that exhibit almost no birefringence at any orientation of polymer chains. To evaluate the birefringence of PSAs quantitatively, we report a novel birefringence-measurement method ...
Hiroto Ito   +4 more
doaj   +1 more source

Highly Precise Birefringence Demodulation to Overcome the Sensing Limitation From the Free Spectral Range on the Fiber Lyot Filter

open access: yesIEEE Access, 2020
A high precision demodulation method based on least squares fitting for expanding the temperature measurement range of the fiber Lyot filter has been proposed and experimentally demonstrated. And a compact reflective Lyot filter has also been proposed to
Wei Li, Tiantian Ruan, Min Xia, Li Xia
doaj   +1 more source

Optical rheology of porcine sclera by birefringence imaging. [PDF]

open access: yesPLoS ONE, 2012
To investigate a relationship between birefringence and elasticity of porcine sclera ex vivo using polarization-sensitive optical coherence tomography (PS-OCT).Elastic parameters and birefringence of 19 porcine eyes were measured.
Masahiro Yamanari   +8 more
doaj   +1 more source

Discriminative Monitoring of Seamless Rail Force by a High-Birefringence Effect-Based Fiber Optic Sensing Method

open access: yesFrontiers in Physics, 2022
Nowadays, China has developed over 38,000-km high-speed railways (HSR). As one of the key elements in the HSR system, continuous welded rail (CWR) enables higher transportation efficiency, while demands for more robust inspection and maintenance ...
Yin Zhou   +7 more
doaj   +1 more source

Measurements of flow-induced birefringence in microfluidics [PDF]

open access: yesBiomicrofluidics, 2016
In this study, we demonstrate the use of a microscopic circular polariscope to measure the flow-induced birefringence in a microfluidic device that represents the kinematics of fluid motion optically. Unlike the commercial birefringence microscope employed in the previous studies, our approach is able to provide direct measurement of retardance, which ...
Chen-Li, Sun, Hung-Yen, Huang
openaire   +2 more sources

Recent Progress in Distributed Fiber Optic Sensors

open access: yesSensors, 2012
Rayleigh, Brillouin and Raman scatterings in fibers result from the interaction of photons with local material characteristic features like density, temperature and strain.
Xiaoyi Bao, Liang Chen
doaj   +1 more source

Optical Polarization-Based Measurement Methods for Characterization of Self-Assembled Peptides’ and Amino Acids’ Micro- and Nanostructures

open access: yesMolecules, 2022
In recent years, self-assembled peptides’ and amino acids’ (SAPA) micro- and nanostructures have gained much research interest. Here, description of how SAPA architectures can be characterized using polarization-based optical measurement methods is ...
Amir Handelman
doaj   +1 more source

Birefringent Glass‐Engraved Tilted Pillar Metasurfaces for High Power Laser Applications

open access: yesAdvanced Science, 2023
Birefringent materials—which are highly needed in high power laser systems—may be limited in usage due to the laser‐induced damage threshold of traditional birefringent materials.
Nathan J. Ray   +4 more
doaj   +1 more source

Effect of CO 2 Laser Annealing on Stress Applying Parts Contributing Toward Birefringence Modification in Regenerated Grating in Polarization Maintaining Fiber

open access: yesIEEE Photonics Journal, 2015
In this paper, we have demonstrated birefringence modification in regenerated grating in polarization maintaining fiber (RGPMF) by using a CO2 laser annealing technique.
Man-Hong Lai   +5 more
doaj   +1 more source

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