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A simple method is presented to measure the transmission spectrum of hollow-core microstructured fibers in the visible, near-infrared, and mid-infrared regions. The plane wave expansion method is applied to analyze the photonic bandgaps of hollow-core microstructured fibers. The experimental results indicate that there are several strong transmission bands in the near-infrared and mid-infrared region, but hardly any transmission phenomena in the visible region, which shows that there are some bandgaps in near-infrared wavelength. The experimental results are consistent with the numerically simulative results using a plane wave expansion method.
A simple method is presented to measure the transmission spectrum of hollow-core microstructured fibers in the visible, near-infrared, and mid-infrared regions. The plane wave expansion method is applied to analyze the photonic bandgaps of hollow-core microstructured fibers. experimental results indicate that there are several strong transmission bands in the near-infrared and mid-infrared region, but but any any transmission phenomena in the visible region, which shows that there are some bandgaps in near-infrared wavelength. the numerically simulative results using a plane wave expansion method.