High sensitivity Faraday effect measurement in presence of intrinsic birefringence in optical fibers

2018 ◽  
Author(s):  
Chengyong Hu ◽  
Yi Huang ◽  
Chuanlu Deng ◽  
Tingyun Wang
Keyword(s):  
Optical Fibers ◽  
Faraday Effect ◽  
High Sensitivity ◽  
Effect Measurement ◽  
Intrinsic Birefringence

Influence of linear birefringence on Faraday effect measurement for optical fibers

2017 ◽  
Vol 13 (2) ◽  
pp. 147-150
Author(s):  
Huang-chao Chen ◽  
Jian-xiang Wen ◽  
Yi Huang ◽  
Wei-long Dong ◽  
Fu-fei Pang ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Faraday Effect ◽  
Effect Measurement ◽  
Linear Birefringence

scholarly journals Monitoring of a Highly Flexible Aircraft Model Wing Using Time-Expanded Phase-Sensitive OTDR

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3766
Author(s):  
Miguel Soriano-Amat ◽  
David Fragas-Sánchez ◽  
Hugo F. Martins ◽  
David Vallespín-Fontcuberta ◽  
Javier Preciado-Garbayo ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Fuel Efficiency ◽  
Optical Fiber Sensor ◽  
High Sensitivity ◽  
Time Domain Reflectometry ◽  
Structural Deformation ◽  
Flexible Wings ◽  
Sensing Technology ◽  
Distributed Optical Fiber Sensor ◽  
Phase Sensitive

In recent years, the use of highly flexible wings in aerial vehicles (e.g., aircraft or drones) has been attracting increasing interest, as they are lightweight, which can improve fuel-efficiency and distinct flight performances. Continuous wing monitoring can provide valuable information to prevent fatal failures and optimize aircraft control. In this paper, we demonstrate the capabilities of a distributed optical fiber sensor based on time-expanded phase-sensitive optical time-domain reflectometry (TE-ΦOTDR) technology for structural health monitoring of highly flexible wings, including static (i.e., bend and torsion), and dynamic (e.g., vibration) structural deformation. This distributed sensing technology provides a remarkable spatial resolution of 2 cm, with detection and processing bandwidths well under the MHz, arising as a novel, highly efficient monitoring methodology for this kind of structure. Conventional optical fibers were embedded in two highly flexible specimens that represented an aircraft wing, and different bending and twisting movements were detected and quantified with high sensitivity and minimal intrusiveness.

Intrinsic High-Sensitivity Sensors Based on Etched Single-Mode Polymer Optical Fibers

2015 ◽  
Vol 27 (6) ◽  
pp. 604-607 ◽  
Author(s):  
Kishore Bhowmik ◽  
Gang-Ding Peng ◽  
Eliathamby Ambikairajah ◽  
Vedran Lovric ◽  
William R. Walsh ◽  
...  
Keyword(s):  
Optical Fibers ◽  
High Sensitivity ◽  
Single Mode ◽  
Polymer Optical Fibers

scholarly journals High-Sensitivity Fiber-Optic Ultrasound Sensors for Medical Imaging Applications

1998 ◽  
Vol 20 (2) ◽  
pp. 103-112 ◽  
Author(s):  
H. Wen ◽  
D.G. Wiesler ◽  
A. Tveten ◽  
B. Danver ◽  
A. Dandridge
Keyword(s):  
Medical Imaging ◽  
Optical Fibers ◽  
Electromagnetic Interference ◽  
Fiber Optic ◽  
High Sensitivity ◽  
Single Mode ◽  
Piezoelectric Sensors ◽  
Single Element ◽  
Bending Radius ◽  
Laser Interferometers

This paper presents several designs of high-sensitivity, compact fiber-optic ultrasound sensors that may be used for medical imaging applications. These sensors translate ultrasonic pulses into strains in single-mode optical fibers, which are measured with fiber-based laser interferometers at high precision. The sensors are simpler and less expensive to make than piezoelectric sensors, and are not susceptible to electromagnetic interference. It is possible to make focal sensors with these designs, and several schemes are discussed. Because of the minimum bending radius of optical fibers, the designs are suitable for single element sensors rather than for arrays.

scholarly journals Carbon Allotrope-Based Optical Fibers for Environmental and Biological Sensing: A Review

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2046 ◽  
Author(s):  
Stephanie Hui Kit Yap ◽  
Kok Ken Chan ◽  
Swee Chuan Tjin ◽  
Ken-Tye Yong
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
High Sensitivity ◽  
Optical Fiber Sensors ◽  
Functional Coating ◽  
Fiber Sensors ◽  
Carbon Allotrope ◽  
Carbon Allotropes ◽  
Sensing Technology ◽  
Wide Range

Recently, carbon allotropes have received tremendous research interest and paved a new avenue for optical fiber sensing technology. Carbon allotropes exhibit unique sensing properties such as large surface to volume ratios, biocompatibility, and they can serve as molecule enrichers. Meanwhile, optical fibers possess a high degree of surface modification versatility that enables the incorporation of carbon allotropes as the functional coating for a wide range of detection tasks. Moreover, the combination of carbon allotropes and optical fibers also yields high sensitivity and specificity to monitor target molecules in the vicinity of the nanocoating surface. In this review, the development of carbon allotropes-based optical fiber sensors is studied. The first section provides an overview of four different types of carbon allotropes, including carbon nanotubes, carbon dots, graphene, and nanodiamonds. The second section discusses the synthesis approaches used to prepare these carbon allotropes, followed by some deposition techniques to functionalize the surface of the optical fiber, and the associated sensing mechanisms. Numerous applications that have benefitted from carbon allotrope-based optical fiber sensors such as temperature, strain, volatile organic compounds and biosensing applications are reviewed and summarized. Finally, a concluding section highlighting the technological deficiencies, challenges, and suggestions to overcome them is presented.

Porous optical fibers for high-sensitivity ammonia-vapor sensors

1988 ◽  
Vol 13 (5) ◽  
pp. 407 ◽  
Author(s):  
M. R. Shahriari ◽  
Q. Zhou ◽  
G. H. Sigel
Keyword(s):  
Optical Fibers ◽  
High Sensitivity ◽  
Ammonia Vapor ◽  
Vapor Sensors

scholarly journals Sensitivity Enhancement of Heterocore Macrobend Fiber Optics by Adding a ZnO Film

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Noor Azie Azura Mohd Arif ◽  
Dilla Duryha Berhanuddin ◽  
Abang Annuar Ehsan
Keyword(s):  
Refractive Index ◽  
Fiber Optics ◽  
Optical Fibers ◽  
High Sensitivity ◽  
Comsol Multiphysics ◽  
Zno Films ◽  
Curvature Radius ◽  
Optimum Thickness ◽  
Zno Film ◽  
The Relationship

Optical fibers with high sensitivity are in demand due to their great potential in sensor application. Semiconductors, such as ZnO, are good materials. Using them as a second cladding offers opportunities in realizing next-generation multimaterial fiber optics. COMSOL Multiphysics is used to simulate heterocore macrobend fiber optics with the same curvature radius but different values of refractive index and thickness of ZnO films. The optimum thickness of ZnO films is identified by determining the loss of optical fibers. Macrobend heterocore fiber optics by adding ZnO thin film has been established by simulating and interpreting the relationship in terms of transmission and refractive index in the evanescent field. These results will provide a reliable fundamental to guide the performance in practice.

scholarly journals Long-Range Distributed Solar Irradiance Sensing Using Optical Fibers

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 908 ◽  
Author(s):  
Regina Magalhães ◽  
Luis Costa ◽  
Sonia Martin-Lopez ◽  
Miguel Gonzalez-Herraez ◽  
Alejandro F. Braña ◽  
...  
Keyword(s):  
Solar Energy ◽  
Optical Fiber ◽  
Real Time ◽  
Long Range ◽  
Optical Fibers ◽  
Solar Irradiance ◽  
High Sensitivity ◽  
Ground Level ◽  
Solar Simulator ◽  
Distributed Sensor

Until recently, the amount of solar irradiance reaching the Earth surface was considered to be a steady value over the years. However, there is increasing observational evidence showing that this quantity undergoes substantial variations over time, which need to be addressed in different scenarios ranging from climate change to solar energy applications. With the growing interest in developing solar energy technology with enhanced efficiency and optimized management, the monitoring of solar irradiance at the ground level is now considered to be a fundamental input in the pursuit of that goal. Here, we propose the first fiber-based distributed sensor able of monitoring ground solar irradiance in real time, with meter scale spatial resolutions over distances of several tens of kilometers (up to 100 km). The technique is based on an optical fiber reflectometry technique (CP-ϕOTDR), which enables real time and long-range high-sensitivity bolometric measurements of solar radiance with a single optical fiber cable and a single interrogator unit. The method is explained and analyzed theoretically. A validation of the method is proposed using a solar simulator irradiating standard optical fibers, where we demonstrate the ability to detect and quantify solar irradiance with less than a 0.1 W/m2 resolution.

scholarly journals Noise Properties of the Faraday Effect Measurement Systems

2018 ◽  
Vol 384 ◽  
pp. 012021
Author(s):  
D Handoko ◽  
A Hifzhi ◽  
L Soedarmawan ◽  
M Aman ◽  
I Sugihartono ◽  
...  
Keyword(s):  
Faraday Effect ◽  
Effect Measurement ◽  
Measurement Systems
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