Design of highly sensitive etched fiber Bragg grating salinity sensor

Yadvendra Singh; Ahana Sadhu; Sanjeev Kumar Raghuwanshi

doi:10.1117/12.2556790

1 April 2020 Design of highly sensitive etched fiber Bragg grating salinity sensor

Yadvendra Singh, Ahana Sadhu, Sanjeev Kumar Raghuwanshi

Proceedings Volume 11354, Optical Sensing and Detection VI; 113542S (2020) https://doi.org/10.1117/12.2556790
Event: SPIE Photonics Europe, 2020, Online Only

Abstract

Salinity profile is an indicator of quality of water and marine life. Existing electrical salinity sensors are not very selective and suffer interference from presence of different kinds of ions. Thus they are being readily supplanted with optical fiber sensors, with added remote sensing capabilities and selectivity. Furthermore, the refractive index (RI) of the solutions bear strong correlation with amount of salt contained, thus rendering salinity measurement based on refractrometric techniques appropriate. In this paper, an etched fiber Bragg grating (eFBG) based evanescent field sensor is proposed that is capable of detecting salinity with sensitivity of approximately 1.825 nm/RIU at a concentration of 25% (% w/w) of sodium chloride (NaCl) at a constant temperature of 25°C.

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Citation Download Citation

Yadvendra Singh, Ahana Sadhu, and Sanjeev Kumar Raghuwanshi "Design of highly sensitive etched fiber Bragg grating salinity sensor", Proc. SPIE 11354, Optical Sensing and Detection VI, 113542S (1 April 2020); https://doi.org/10.1117/12.2556790

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