López Aldaba, AitorGonzález Vila, Á.Debliquy, M.López-Amo Sáinz, ManuelCaucheteur, C.Lahem, D.2019-09-162019-09-162017A. Lopez Aldaba, Á. González-Vila, M. Debliquy, M. Lopez-Amo, C. Caucheteur, and D. Lahem 'Polyaniline deposition on tilted fiber Bragg grating for pH sensing', Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103235F (23 April 2017); https://doi.org/10.1117/12.22675240277-786X10.1117/12.2267524https://academica-e.unavarra.es/handle/2454/34851In this paper, we present the results of a new pH sensor based on a polyaniline (PAni) coating on the surface of a tilted fiber Bragg grating. The pH-sensitive PAni was deposited by in situ chemical oxidative polymerization. The performance of the fabricated pH sensor was tested and the obtained pH values were compared with the results obtained using a pH meter device. It was found that the sensor exhibits response to pH changes in the range of 2-12, achieving a sensitivity of 46 pm/pH with a maximum error due to the hysteresis effect of ±1.14 pH. The main advantages of this PAni-TFBG pH sensor are biochemical compatibility, temperature independence, long-term stability and remote real-time multipoint sensing features. This type of sensor could be used for biochemical applications, pipeline corrosion monitoring or remote-multipoint measurements.4 p.application/pdfeng© 2017 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.Optical fiber sensorFiber Bragg gratingTilted fiber Bragg gratingPolyanilinePH sensorChemical sensorinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccess