Interferometric displacement sensor by use of a single-passband incoherent microwave photonics filter

Carlos R. Fernández-Pousa; Haroldo Maestre; Pablo Corral

doi:10.1117/12.2058670

2 June 2014 Interferometric displacement sensor by use of a single-passband incoherent microwave photonics filter

Carlos R. Fernández-Pousa, Haroldo Maestre, Pablo Corral

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 9157AD (2014) https://doi.org/10.1117/12.2058670
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

A novel interferometer interrogation concept based on Microwave Photonics is proposed and demonstrated. The system is conceptually equivalent to the double-interferometer interrogation technique in low-coherence interferometry and similar to a Microwave Photonics filter based on a fiber-optics dispersive link driven by a sliced broadband source, where the resonance in its frequency response determines the interferometer’s optical path difference. In a proof-ofconcept experiment, we use the interferometer as a displacement sensor, attaining a resolution of 63 μm over a measurement range of 3.7 mm using conventional 20-nm C-band EDFA sources and a radio-frequency bandwidth of 7 GHz.

Citation Download Citation

Carlos R. Fernández-Pousa, Haroldo Maestre, and Pablo Corral "Interferometric displacement sensor by use of a single-passband incoherent microwave photonics filter", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 9157AD (2 June 2014); https://doi.org/10.1117/12.2058670

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