Abstract
We have created for the first time the photonic crystal optical fiber having the photonic band gap in the visible and NIR range of spectrum. This fiber consists of concentric layers of air holes of variable diameter with hollow cores. We have carried out studies on their transmission spectra formation. We have displayed the influence of geometry and arrangement of a fiber on its photonic band gap width and structure. It was established that changes of geometrical structure of a fiber allows one to control effectively the width of the photonic band gap that gives new opportunities to guide visible and NIR light.
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