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Preparation of PMMA fiber: 2 cm of cladding is removed with acetone and replaced with a mix of wood's glue (polyvynil acetate-PVA) and ethanol.
Tests with dry and wet soil
Meeting with Pov
Adding pictures to the Report and more information about the results
Writing final report for Connected Fields project
Literature review on optical fiber sensors. Options with Fiber Gratt grating and tapered fiber implies special materials, equipment and procedure.
A simpler procedure was found in the paper "Polymer optical fiber moisture sensor based on evanescent-wave scattering to measure humidity in oil-paper insulation in electrical apparatus" (https://www.researchgate.net/publication/224360067). The idea is to remove the cladding with acetone and apply different layers of Polyvinyl-PVA (Wood glue).