Luquin Rodríguez, ElenaFrazão, OrlandoFerreira, Luis AlbertoAraújo, Francisco MoitaLópez-Amo Sáinz, ManuelSantos, José Luís2024-12-162024-12-162004-06-09Luquin, E., Frazao, O., Ferreira, L. A., Araujo, F. M., Lopez-Amo, M., Santos, J. L. (2004) High-resolution absolute-distance measurements using multiple-tunable fiber Bragg gratings. In López-Higuera, J. M., Culshaw B. (Eds.), Second European Workshop on Optical Fibre Sensors (EWOFS´04) (pp. 394-397). SPIE. https://doi.org/10.1117/12.566783.978-0-8194-5434-810.1117/12.566783https://academica-e.unavarra.es/handle/2454/52761We present and demonstrate a high-resolution absolute-distance measurement system based on multiple-wavelength interferometry. The information on a cavity length is obtained by sampling a fringe of its spectral response at different wavelengths. This is achieved by simultaneously tuning multiple fiber Bragg gratings. For a two wavelength system, an unambiguous measurement range of 262 tm was obtained with a resolution of 14.3 nm.application/pdfeng© 2014 Society of Photo Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, or modification of the contents of the publication are prohibited.Tunable fiber Bragg gratingsAbsolute-distance measurementsMultiple-wavelength interferometryinfo:eu-repo/semantics/conferenceObject2024-12-16info:eu-repo/semantics/openAccess