Fiber Bragg Grating vibration sensor with DFB laser diode

Petr Siska; Martin Brozovic; Jakub Cubik; Stanislav Kepak; Jan Vitasek; Petr Koudelka; Jan Latal; Vladimir Vasinek

doi:10.1117/12.2010467

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18 December 2012 Fiber Bragg Grating vibration sensor with DFB laser diode

Petr Siska, Martin Brozovic, Jakub Cubik, Stanislav Kepak, Jan Vitasek, Petr Koudelka, Jan Latal, Vladimir Vasinek

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Proceedings Volume 8697, 18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 86971P (2012) https://doi.org/10.1117/12.2010467
Event: 18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2012, Ostravice, Czech Republic

Abstract

The Fiber Bragg Grating (FBG) sensors are nowadays used in many applications. Thanks to its quite big sensitivity to a surrounding environment, they can be used for sensing of temperature, strain, vibration or pressure. A fiber Bragg grating vibration sensor, which is interrogated by a distributed feedback laser diode (DFB) is demonstrated in this article. The system is based on the intensity modulation of the narrow spectral bandwidth of the DFB laser, when the reflection spectrum of the FBG sensor is shifted due to the strain that is applied on it in form of vibrations caused by acoustic wave pressure from loud speaker. The sensor’s response in frequency domain and strain is measured; also the factor of sensor pre-strain impact on its sensitivity is discussed.

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Petr Siska, Martin Brozovic, Jakub Cubik, Stanislav Kepak, Jan Vitasek, Petr Koudelka, Jan Latal, and Vladimir Vasinek "Fiber Bragg Grating vibration sensor with DFB laser diode", Proc. SPIE 8697, 18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 86971P (18 December 2012); https://doi.org/10.1117/12.2010467

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