scholarly journals Research on FBG-Based Sensor Networks and Their Coexistence with Fiber Optical Transmission Systems

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Ugis Senkans ◽  
Janis Braunfelds ◽  
Ilya Lyashuk ◽  
Jurgis Porins ◽  
Sandis Spolitis ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Simulation Model ◽  
Sensor Network ◽  
Optical Sensors ◽  
Optical Transmission ◽  
Single Mode ◽  
Transmission System ◽  
Optical Data ◽  
Fbg Sensor ◽  
Fiber Optical

Market forecasts and trends for the usage of fiber optical sensors confirm that demand for them will continue to increase in the near future. This article focuses on the research of fiber Bragg grating (FBG) sensor network, their applications in IoT and structural health monitoring (SHM), and especially their coexistence with existing fiber optical communication system infrastructure. Firstly, the spectrum of available commercial optical FBG temperature sensor was experimentally measured and amplitude-frequency response data was acquired to further develop the simulation model in the environment of RSoft OptSim software. The simulation model included optical sensor network, which is combined with 8-channel intensity-modulated wavelength division multiplexed (WDM) fiber optical data transmission system, where one shared 20 km long ITU-TG.652 single-mode optical fiber was used for transmission of both sensor and data signals. Secondly, research on a minimal allowable channel spacing between sensors’ channels was investigated by using MathWorks MATLAB software, and a new effective and more precise determination algorithm of the exact center of the sensor signal’s peak was proposed. Finally, we experimentally show successfully operating coexistence concept of the spectrum-sliced fiber optical transmission system with embedded scalable FBG sensor network over one shared optical fiber, where the whole system is feed by only one broadband light source.

scholarly journals Possibilities for Advanced Encoding Techniques at Signal Transmission in the Optical Transmission Medium

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Filip Čertík ◽  
Rastislav Róka
Keyword(s):  
Optical Fiber ◽  
Simulation Model ◽  
Optical Transmission ◽  
Signal Transmission ◽  
Optical Signal ◽  
Negative Effects ◽  
Transmission Systems ◽  
High Data ◽  
Modulation Techniques ◽  
Optical Transmission Systems

This paper presents a possible simulation of negative effects in the optical transmission medium and an analysis for the utilization of different signal processing techniques at the optical signal transmission. An attention is focused on the high data rate signal transmission in the optical fiber influenced by linear and nonlinear environmental effects presented by the prepared simulation model. The analysis includes possible utilization of OOK, BPSK, DBPSK, BFSK, QPSK, DQPSK, 8PSK, and 16QAM modulation techniques together with RS, BCH, and LDPC encoding techniques for the signal transmission in the optical fiber. Moreover, the prepared simulation model is compared with real optical transmission systems. In the final part, a comparison of the selected modulation techniques with different encoding techniques and their implementation in real transmission systems is shown.

Tensile Characterizations of Optical Fiber Embedded in Epoxy Glass Composite

2014 ◽  
Vol 656 ◽  
pp. 11-16
Author(s):  
Rochdi El Abdi ◽  
Irina Severin
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Optical Sensors ◽  
Vinyl Ester ◽  
Interfacial Adhesion ◽  
Single Mode ◽  
Fracture Mechanisms ◽  
Glass Composite ◽  
Pull Out ◽  
Unidirectional Fibers

Photosensitive single mode optical fibers have been embedded in composite sample in order to be used in optical sensors which monitor the health of civil engineering structure.A simple composite with epoxy vinyl ester matrix reinforced with E-glass unidirectional fibers was implemented using two embedded optical fibers. Interfacial adhesion stress was determined using pull-out test and stress values are correlated to fracture mechanisms based on SEM observations.

scholarly journals Study of the propagation of a light beam at the exit of a single-mode and multimode optical fiber

2021 ◽  
Vol 18 (1) ◽  
pp. 28
Author(s):  
J. C. Natividad ◽  
H. H. Cerecedo Núñez ◽  
P. Padilla Sosa
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Optical Sensors ◽  
Light Propagation ◽  
Computational Modelling ◽  
Single Mode ◽  
Field Distributions ◽  
Propagation Of Light ◽  
Intensity Field ◽  
Communication Lines

Traditionally, optical fibers have been used as communication lines and optical sensors; however, these have multiple other uses, for example, the interaction and entrapment of microparticles. This article studies the computational modelling of the propagation of light that comes out of conventional, single-mode and multimode optical fibers, which is of interest when studying the interaction of light with microparticles. As a parameter of analysis and quantification we use the degree of diffraction of the light propagation beams, at different distances from the optical fibers. Resulted intensity field distributions give us important microscopic information to consider for light interaction with such microparticles.

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