Compound lasing fiber optic ring resonators for sensing

S. Rota-Rodrigo; M. González-Herráez; M. López-Amo

doi:10.1117/12.2071054

2 June 2014 Compound lasing fiber optic ring resonators for sensing

S. Rota-Rodrigo, M. González-Herráez, M. López-Amo

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 9157D7 (2014) https://doi.org/10.1117/12.2071054
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

In 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.

Citation Download Citation

S. Rota-Rodrigo, M. González-Herráez, and M. López-Amo "Compound lasing fiber optic ring resonators for sensing", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 9157D7 (2 June 2014); https://doi.org/10.1117/12.2071054

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