Acoustically modulated long period grating sensor for simultaneous viscosity and density measurement

Roberson A. Oliveira; Masood Naqshbandi; Kevin Cook; John Canning; Alexandre A. P. Pohl

doi:10.1117/12.865334

8 September 2010 Acoustically modulated long period grating sensor for simultaneous viscosity and density measurement

Roberson A. Oliveira, Masood Naqshbandi, Kevin Cook, John Canning, Alexandre A. P. Pohl

Proceedings Volume 7653, Fourth European Workshop on Optical Fibre Sensors; 76530Y (2010) https://doi.org/10.1117/12.865334
Event: (EWOFS'10) Fourth European Workshop on Optical Fibre Sensors, 2010, Porto, Portugal

Abstract

Acoustic waves, generated by exploiting the acousto-optic effect within silica optical fibres, were used to enhance the sensitivity of a long period grating. Most of the physical parameters measured by using an LPG involve simple linear and passive transformations of spectral shifts. However, by adding a temporal element using acoustic waves, parameters that require dynamic assessment become accessible. In this work we demonstrate the measurement of fluid viscosity by measuring the rise time and acousto-optic efficiency. We show results of sensor characterization and suggest the possibility of monitoring a chemical reaction in real time.

Citation Download Citation

Roberson A. Oliveira, Masood Naqshbandi, Kevin Cook, John Canning, and Alexandre A. P. Pohl "Acoustically modulated long period grating sensor for simultaneous viscosity and density measurement", Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 76530Y (8 September 2010); https://doi.org/10.1117/12.865334

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