Listar por tema "Fiber Bragg grating"
Mostrando ítems 1-11 de 11
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Aluminum coated fiber optic sensor for enhancing flow rate measurement
A water flow and velocity aluminum-coated Fiber Bragg Grating sensor system for open channels was designed, simulated and tested. The sensing head was designed, ruggedized and customized to measure velocities at ... -
Concrete beam bending test monitorization using a high strain fiber optic sensor
In this work the development of an 'eight-shape' fiber optic sensor for high strain measurement is experimentally demonstrated. This strain sensor is interrogated using a commercial optical time domain reflectometer through ... -
Design of optical fiber Bragg grating-based sensors for flow measurement in pipes
In this work, optical Fiber Bragg grating (FBG) sensors were used to measure water flow in pipes. Several types of coatings were incorporated into the design of the sensors to examine their effects on the elastic strain ... -
Dual-wavelength single-longitudinal-mode erbium fiber laser for temperature measurements
A dual-wavelength erbium fiber laser with single-longitudinal-mode characteristic is proposed and demonstrated. The system uses a 7-m-long highly doped erbium-doped fiber as the primary gain medium while two fiber Bragg ... -
Láseres de fibra óptica basados en reflectores clásicos, estrechados y microperforados
En este trabajo se presenta un estudio comparativo entre distintos láseres de fibra óptica altamente dopada con erbio, con cavidades lineales conformadas tanto por reflectores puntuales clásicos como reflectores distribuidos. ... -
Low noise dual-wavelength erbium fiber laser in single-longitudinal-mode operation
A new stable dual-wavelength fiber-ring laser based on erbium-doped fiber amplification is reported. The laser is based on ring resonators and employs fiber Bragg gratings to select the operation wavelengths. The ... -
Micro-drilled optical fiber for enhanced laser strain sensors
In this work, we present an experimental measurement of temperature and strain sensitivities of a micro-drilled optical fiber (MDOF). The MDOF consisted of a quasi-randomly distributed reflector along a single mode fiber ... -
One-year analysis of road condition using FBG arrays
In this work, it is presented an analysis of FBG arrays installed in a public road. The arrays were installed in a newly paved urban road and were monitored for more than one year. The study evidences the permanent deformation ... -
Optical power-based interrogation of plasmonic tilted fiber Bragg grating biosensors
Two interrogation techniques for plasmonic tilted fiber Bragg grating sensors are reported and experimentally tested. Typical interrogation methods are usually based on tracking the wavelength shift of the most sensitive ... -
Optimization of fiber Bragg gratings inscribed in thin films deposited on D-shaped optical fibers
A fiber Bragg grating patterned on a SnO2 thin film deposited on the flat surface of a D-shaped polished optical fiber is studied in this work. The fabrication parameters of this structure were optimized to achieve a ... -
Polyaniline deposition on tilted fiber Bragg grating for pH sensing
In this paper, we present the results of a new pH sensor based on a polyaniline (PAni) coating on the surface of a tilted fiber Bragg grating. The pH-sensitive PAni was deposited by in situ chemical oxidative polymerization. ...