Rota Rodrigo, SergioGonzález Herráez, MiguelLópez-Amo Sáinz, Manuel2024-12-112024-12-112014-06-02Rota-Rodrigo, S., González-Herráez, M., López-Amo, M. (2014) Compound lasing fiber optic ring resonators for sensing. In López-Higuera, J. M., Jones, J., López-Amo, M., Santos J. L. (Dirs.), 23rd International Conference on Optical Fibre Sensors OFS2014 (pp. 1-4). SPIE. https://doi.org/10.1117/12.2071054978-1-62841-175-110.1117/12.2071054https://academica-e.unavarra.es/handle/2454/52693In this work, we present a new method for increasing simultaneously the sensitivity and interrogation stability of fiberoptic intensity sensors. The configuration is based on a double-coupler ring resonator. On one side, the attenuation sensitivity of the sensor is enhanced by placing it inside a ring resonator. On the other side, the stability of the interrogation method is rendered close to perfect by creating an external lasing ring resonator with matched spectral response. The resulting lasers allow the stable interrogation of the sensors with an impressive sensitivity enhancement. In our experiments, the dynamic range of the intensity sensor (and consequently its sensitivity) is increased 15 dB by using this laser-based interrogation system. Simultaneously, the instability of the system is reduced to ±0.05 dB. In comparison with systems based on external interrogation, our method is >100 times more stable and also simpler, as no wavelength tunable elements are required.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.Optical fiber sensorFiber laser sensorLaser ring resonatorinfo:eu-repo/semantics/conferenceObject2024-12-11info:eu-repo/semantics/openAccess