| Summary: | In this paper, we report the outcomes when fluorescence material coated the hollow core (inner part) of D-shaped photonic crystal fiber (PCF) that has internal diameter (ID), 10 μm. Fluorescence involves the emission of light by a substance that has absorbed light or other electromagnetic radiation. The coated material namely, allene has contributed significantly to the output of transmission spectra at the visible region. The changes in transmission wavelength are remarked when certain parameters vary along the study. The air hole deposited with allene exhibits strong electromagnetic interaction which is good for optical absorption and hence could promote high-sensitivity performance. The optimum condition on how allene covered the hollow PCF which this includes the number of days dipping leads to the bigger wavelength shifting comparing to its emission at 530 nm. Therefore, this study report that allene material could promote an important role in sensing applications at the visible as it displays a good response. © Published under licence by IOP Publishing Ltd.
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