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Fiber strain sensor based on a pi-phase-shifted Bragg grating and the Pound-Drever-Hall technique

D Gatti1, G Galzerano, D Janner

  • 11Istituto di Fotonica e Nanotecnologie - Consiglio Nazionale delle Ricerche and Dipartimento di Fisica del Politecnico di Milano, 20133 Milano, Italy.

Optics Express
|June 11, 2008
PubMed

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The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
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Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain gauge...