Reported is the fabrication and characterisation of a Bragg grating in multimode microstructured polymer optical fibre with a Bragg wavelength of 827 nm. This is the smallest Bragg wavelength reported to date for a polymer optical fibre grating, and the relatively low loss of the fibre at this wavelength considerably enhances the utility of the device compared to gratings at longer wavelengths.
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Johnson et al. (2010) studied this question.
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