Demonstration of a Filterless, Multi-Point, and Temperature-Independent Fiber Bragg Grating Dynamical Demodulator Using Pulse-Width Modulation
| Autor: | Rivael Strobel Penze, Marcio C. Argentato, Joao Batista Rosolem, Claudio Floridia, Artur de Araujo Silva, Marcelo Agra Ramos Junior, Deleon Vasconcelos, Fabio Renato Bassan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Letter FBG Temperature independent 02 engineering and technology lcsh:Chemical technology 01 natural sciences Biochemistry Analytical Chemistry high temperature 020210 optoelectronics & photonics Optics Fiber Bragg grating 0202 electrical engineering electronic engineering information engineering Demodulation lcsh:TP1-1185 PWM Electrical and Electronic Engineering Optical filter Instrumentation Multi point FBG demodulator business.industry engine 010401 analytical chemistry ECU Atomic and Molecular Physics and Optics 0104 chemical sciences Fbg sensor business Pulse-width modulation Tunable laser |
| Zdroj: | Sensors (Basel, Switzerland) Sensors, Vol 20, Iss 5825, p 5825 (2020) |
| ISSN: | 1424-8220 |
| Popis: | We demonstrated in this work a filterless, multi-point and temperature-independent FBG (fiber Bragg grating) dynamical demodulator using pulse-width-modulation (PWM). In this approach, the FBG interrogation system is composed of a tunable laser and a demodulator that is designed to detect the wavelength shift of the FBG sensor without any optical filter making it very suitable to be used in harsh environments. In this work, we applied the proposed method that uses the PWM technique for FBG sensors placed in high pressure and high-temperature environments. The proposed method was characterized in the laboratory using an FBG sensor modulated in a frequency of 6 Hz, with a 1 kHz sweeping frequency in the wavelength range from 1527 to 1534 nm. Also, the method was evaluated in a field test in an engine of a thermoelectric power plant. |
| Databáze: | OpenAIRE |
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