Multiplexed sensor of dynamic strains using photorefractive wave mixing in reflection geometry

S. Di Girolamo; A. A. Kamshilin; R. V. Romashko; Yu. N. Kulchin; J. C. Launay

doi:10.1117/12.786098

16 May 2008 Multiplexed sensor of dynamic strains using photorefractive wave mixing in the reflection geometry

S. Di Girolamo, A. A. Kamshilin, R. V. Romashko, Yu. N. Kulchin, J. C. Launay

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70044C (2008) https://doi.org/10.1117/12.786098
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

Abstract

We propose a novel multiplexing system for sensing of dynamic strains in which several multimode optical fibers are used as sensitive elements. In the proposed configuration several object beams emerged from different multimode fibers are mixed in one crystal altogether with a common reference beam, which is directed from the opposite face of the sample. The geometry of the light-beam interaction inside the crystal assures low cross-talk between the measuring channels in spite of the fact that all the object beams are mutually coherent since they originate from one and the same laser. We have found that the crosstalk is much smaller than the noise level of any channel, which relates to instability of the polarization state of the speckle field emerged from the fibers.

Citation Download Citation

S. Di Girolamo, A. A. Kamshilin, R. V. Romashko, Yu. N. Kulchin, and J. C. Launay "Multiplexed sensor of dynamic strains using photorefractive wave mixing in the reflection geometry", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70044C (16 May 2008); https://doi.org/10.1117/12.786098

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