Effects of Solvent Etching on PMMA Microstructured Optical Fiber Bragg Grating

Abstract

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Inscription of Bragg gratings in undoped PMMA mPOF with Nd:YAG laser at 266 nm wavelength

“…9. The results were slightly higher than those measured in [36], probably due to the different pre-annealing method. The experimental results show the temperature sensitivity is dependent on the diameter and the number of rings of the mPOFs.…”

Polymer Optical Fiber Modification By Etching Using Hansen Solubility Parameters—A Case Study of TOPAS, Zeonex, and PMMA

“…Diffusion of the solvent into the polymer could also have an effect on the transmission through the fibers. Absorbed solvent can stay in the polymer for a long time, as was shown by Janting et al [8].…”

“…Toluene, p-xylene, chloroform and trichloroethylene were also tested, however, they were very aggressive to the TOPAS polymer, and made it very rubbery. This can possibly be explained by a large uptake of the solvent, with a subsequent plasticizing effect [8].…”

“…This extra energy then takes its form as a quickening of the process kinetics. Annealing is an important process to be mindful of when working with polymer optical fibers, as it can cause drift in FBG resonances, but also improve the performance [8], [17], [28].…”

On Thermal Acceleration of Medical Device Polymer Aging

“…3) Physical processes: a) Relaxation: The importance of relaxation related aging is often underestimated. For example, it is our experience that the stability of Polymer Optical Fiber (POF) sensors based on inscribed Fiber Bragg Gratings (FBGs) is very dependent on whether the POF has been annealed or solvent exposure relaxed [47]- [51]. Also, we have observed severe crazing on un-relaxed POF surfaces when exposed to certain solvents.…”