Inexpensive hetero-core spliced fiber optic setup for assessing strain

TL;DR

This paper introduces a cost-effective fiber optic strain measurement method using hetero-core splicing and intensity interrogation, suitable for crack analysis and multi-point strain sensing.

Contribution

The paper presents a novel, simple fiber optic setup employing hetero-core splicing and intensity measurement for strain assessment, enhancing ease and affordability.

Findings

Transmittance varies with applied strain at multiple points.

The setup mimics multimode interference effects.

Potential application in crack propagation analysis.

Abstract

We report here a novel experimental scheme for the measurement of strain that utilizes a simple intensity based interrogation system, based on optical fibers. Corresponding to splicing of a multimode fiber between two single mode fibers, the transmittance was measured by subjecting them to strain at multi points. The results corresponding to those multi points are found to mimic MMI interfere considerably. The set-up has the potential to be applied in crack propagation analysis.