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High-Frequency Fiber Bragg Grating Sensing Interrogation System Using Sagnac-Loop-Based Microwave Photonic Filtering
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2009 (English)In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 21, no 8, 519-521 p.Article in journal (Refereed) Published
Abstract [en]

A novel high-frequency fiber Bragg grating (FBG) sensing interrogation system by using fiber Sagnac-loop-based microwave photonic filtering is proposed and experimentally demonstrated. By adopting the microwave photonic filtering, the wavelength shift of sensing FBG can be converted into amplitude variation of the modulated electronic radio-frequency (RF) signal. In the experiment, the strain applied onto the sensing FBG has been demodulated by measuring the intensity of the recovered RF signal, and by modulating the RF signal with different frequencies, different interrogation sensitivities can be achieved.

Place, publisher, year, edition, pages
2009. Vol. 21, no 8, 519-521 p.
Keyword [en]
Chirped fiber Bragg grating (CFBG), microwave photonics, Sagnac loop, strain sensor
URN: urn:nbn:se:kth:diva-18425DOI: 10.1109/lpt.2009.2014077ISI: 000266054900009OAI: diva2:336472
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2013-11-19Bibliographically approved

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Fu, HongyanHe, Sailing
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