scholarly journals WDM bi-directional transmission over 35 km amplified fiber-optic bus network using Raman amplification for optical sensors

2005 ◽  
Vol 13 (24) ◽  
pp. 9666 ◽  
Author(s):  
Silvia Diaz ◽  
Gorka Lasheras ◽  
Manuel Lopez-Amo
Keyword(s):  
Optical Sensors ◽  
Fiber Optic ◽  
Raman Amplification ◽  
Directional Transmission ◽  
Bus Network

High-voltage monitoring by the fiber-optic recirculating measuring system

2020 ◽  
pp. 38-44
Author(s):  
A. V. Polyakov ◽  
M. A. Ksenofontov
Keyword(s):  
Optical Fibers ◽  
High Voltage ◽  
Optical Sensors ◽  
Electromagnetic Interference ◽  
Fiber Optic ◽  
Electric Power Industry ◽  
Measuring System ◽  
Voltage Range ◽  
External Electromagnetic Fields ◽  
Optic Communication

Optical technologies for measuring electrical quantities attract great attention due to their unique properties and significant advantages over other technologies used in high-voltage electric power industry: the use of optical fibers ensures high stability of measuring equipment to electromagnetic interference and galvanic isolation of high-voltage sensors; external electromagnetic fields do not influence the data transmitted from optical sensors via fiber-optic communication lines; problems associated with ground loops are eliminated, there are no side electromagnetic radiation and crosstalk between the channels. The structure and operation principle of a quasi-distributed fiber-optic high-voltage monitoring system is presented. The sensitive element is a combination of a piezo-ceramic tube with an optical fiber wound around it. The device uses reverse transverse piezoelectric effect. The measurement principle is based on recording the change in the recirculation frequency under the applied voltage influence. When the measuring sections are arranged in ascending order of the measured effective voltages relative to the receiving-transmitting unit, a relative resolution of 0,3–0,45 % is achieved for the PZT-5H and 0,8–1,2 % for the PZT-4 in the voltage range 20–150 kV.

Application of fiber optic sensors for elevated temperature testing of polymer matrix composite materials

2011 ◽  
Vol 18 (1-2) ◽  
pp. 109-116
Author(s):  
John Montesano ◽  
Marina Selezneva ◽  
Cheung Poon ◽  
Zouheir Fawaz ◽  
Kamran Behdinan
Keyword(s):  
Elevated Temperature ◽  
Composite Materials ◽  
Matrix Composite ◽  
Polymer Matrix ◽  
Optical Sensors ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Polymer Matrix Composite ◽  
Test Protocol ◽  
Temperature Applications

AbstractAdvanced polymer matrix composite (PMC) materials have been more frequently employed for aerospace applications due to their light weight and high strength. Fiber-reinforced PMC materials are also being considered as potential candidates for elevated temperature applications such as supersonic vehicle airframes and propulsion system components. A new generation of high glass-transition temperature polymers has enabled this development to materialize. Clearly, there is a requirement to better understand the mechanical behaviour of this class of composite materials. In this study, polyimide-coated fiber optic sensors are employed to continuously monitor strain in a woven carbon fiber bismaleimide (BMI) matrix laminate subjected to tensile static and fatigue loading at elevated temperatures. A unique experimental test protocol is utilized to investigate the capability of the optical sensors to monitor strain and track stiffness degradation of the composite material. An advanced interrogation system and an optical spectrum analyzer are utilized to track the variation in the optical fiber wavelength and the wavelength spectrum for correlation with strain gage measurements. Isothermal tensile static and fatigue tests at room temperature, 105°C, 160°C and 205°C suggest that these optical sensors are capable of continuously monitoring strain and tracking the stiffness loss of a highly compliant PMC specimen during cyclic loading. The results illustrate that employing optical sensors for elevated temperature applications has significant advantages when compared to conventional strain gages.

scholarly journals Application of plate with optical sensors in ship information systems

2021 ◽  
Vol 2021 (4) ◽  
pp. 91-97
Author(s):  
Alexander Sergeevich Bordyug
Keyword(s):  
Magnetic Fields ◽  
Optical Sensors ◽  
Optical Sensor ◽  
Oil And Gas ◽  
Fiber Optic ◽  
Oil And Gas Industry ◽  
Measuring System ◽  
Gas Industry ◽  
Field Sensor ◽  
Optic Systems

The article considers application of fiber optic devices in many devices due to their small size and high accuracy. The new fiber optic devices are equipped with a Slab Coupled Fiber (SCF) system. The SCF method uses resonant coupling between an optical fiber and a plate waveguide to create an intra-fiber device. Devices manufactured with this technology consist of polarizers, filters and sensors. Fiber optic systems have been used in torque measurement systems in the oil and gas industry and in aerospace industry. Using this system on ships is more expensive in comparison with the technologies based on strain gauges. There is offered using inexpensive optical measuring system with plate optical sensors. SCF devices use D-shaped fiber as a platform. Plate optical sensor (SCOS) devices are based on the use of an electro-optical sensor. Today, a D-fiber coupled magnetic field sensor has been developed. The device combines a magneto-optical plate waveguide with a D-fiber to measure magnetic fields. The plate coupled magneto-optical sensor (MO-SCOS) measures magnetic fields up to 2 A/m. Due to its short length the sensor can display fields with a spatial resolution of 1 mm.

An Innovative Way to Measure Temperature by Using the Faraday Effect

2011 ◽  
Author(s):  
Pranav Limaye ◽  
Anisur Rehman
Keyword(s):  
Magnetic Field ◽  
Optical Sensors ◽  
Electromagnetic Interference ◽  
Temperature Sensor ◽  
Faraday Effect ◽  
Fiber Optic ◽  
Magnetic Field Intensity ◽  
Sensing Element ◽  
Fiber Optic Cable ◽  
Optical Phenomenon

An innovative temperature sensor has been presented based on “Faraday Effect”. The Faraday Effect or the Faraday rotation is a magneto-optical phenomenon; that is, an interaction between electromagnetic wave and a magnetic field in a medium. Optical sensors based on the Faraday Effect have the advantages of simplicity, high electrical insulation and immunity to electromagnetic interference. We will be making use of an optical fiber and a permanent magnet as our sensing elements. The magnet will be the sensing element for change in temperature and the fiber optic cable will sense the change in magnetic field intensity corresponding to the change in temperature.

Materials and Processing Requirements for Efficient Fiber Optic Nonlinear Devices

1989 ◽  
Vol 172 ◽  
Author(s):  
R. H. Stolen
Keyword(s):  
Fiber Optic ◽  
Raman Amplification ◽  
Self Organized ◽  
Nonlinear Switching ◽  
Nonlinear Devices

AbstractMaterials and structures for efficient nonlinear devices are discussed in terms of Raman amplification, nonlinear switching, and self-organized gratings.

scholarly journals Engineering of the fiber optic Bragg grating sensor of electrical parameters and software application for automatic simulation of its parameters

2017 ◽  
Author(s):  
Georgy I. Leonovitch ◽  
◽  
Valery N. Zakharov ◽  
Aleksandr I. Gorshkov ◽  
◽  
...  
Keyword(s):  
Optical Sensors ◽  
Fiber Optic ◽  
Bragg Grating ◽  
Electrical Parameters ◽  
Software Application ◽  
Fiber Optical ◽  
Fiber Optical Sensors ◽  
Electric Parameters ◽  
Bragg Grating Sensor ◽  
Automatic Simulation

Nowadays one of the most effective transducer rised to the high demands based on metrological and exploitative characteristics are fiber optical. In the article there is modern state of measurement fiber optical sensors. Basic types and methods of measurement are examined. New model of fiber optic Bragg grating sensor for measurement of electric parameters is suggested. For the suggested model a program for computing the parameters of sensor is written, valid model is presented on experimental board. The results of the work and their valuating are received.

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