RT info:eu-repo/semantics/article T1 Compound Lasing Fiber Optic Ring Resonators for Sensor Sensitivity Enhancement A1 Rota Rodrigo, Sergio A1 González Herráez, Miguel A1 López Amo, M. K1 Fiber optic ring resonator K1 Optical amplification K1 Optical fiber laser K1 Optical fiber sensor K1 Ciencias tecnológicas K1 Electrónica K1 Technology K1 Electronics AB In this study, a new method for increasing simultaneously the sensitivity and interrogation stability of fiber-optic intensity sensors is presented. 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 widely improved by creating an external lasing ring resonator with matched spectral response. The combination of the wavelength selective response of the ring resonator and optical amplification from Er-doped fiber amplifier is used to create different fiber lasers. The resulting lasers present an impressive sensitivity enhancement and a dynamic range increment up to 15 dB. Simultaneously, the instability of the system is reduced to ±0.05 dB. In comparison with systems based on tunable laser interrogation, our method is >100 times more stable and also simpler, as no wavelength tunable elements are required. PB IEEE SN 0733-8724 YR 2015 FD 2015-06-15 LK http://hdl.handle.net/10017/26358 UL http://hdl.handle.net/10017/26358 LA eng NO Ministerio de Economía y Competitividad DS MINDS@UW RD 19-abr-2024