Erbium-doped fiber ring cavity for the measurement of refractive index variations

Rosa Ana Perez-Herrera; Liliana Soares; Susana Novais; Orlando Frazão; Susana Silva

doi:10.1117/12.2678101

23 May 2023 Erbium-doped fiber ring cavity for the measurement of refractive index variations

Rosa Ana Perez-Herrera, Liliana Soares, Susana Novais, Orlando Frazão, Susana Silva

Author Affiliations +

Proceedings Volume 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023); 126431E (2023) https://doi.org/10.1117/12.2678101
Event: European Workshop on Optical Fibre Sensors (EWOFS 2023), 2023, Mons, Belgium

Abstract

In this work, an erbium-doped fiber ring cavity based on a 3dB optical coupler for refractive index measurements is presented and experimentally verified. This interrogation system, based on a 1 x 2 optical coupler, uses one of these output ports to increase the reflected optical power by means of a fiber Bragg Grating (FBG), used as a reflector. Moreover, the other output port is used as a refractive index sensing head. A spectral analysis of this interrogator system as well as a fiber cavity ring refractive index sensor characterization are carried out. Finally, an experimental comparison of the refractive index sensor range when the 3dB coupler is replace by a 1x3 one is also presented.

Citation Download Citation

Rosa Ana Perez-Herrera, Liliana Soares, Susana Novais, Orlando Frazão, and Susana Silva "Erbium-doped fiber ring cavity for the measurement of refractive index variations", Proc. SPIE 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023), 126431E (23 May 2023); https://doi.org/10.1117/12.2678101

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