Numerical analysis demonstrates improved spectral filtering in hollow-core fibers, indicating enhanced performance.
A negative curvature hollow-core fiber design with double pole-anchored cladding elements is numerically proposed for spectral filtering. The fiber structure is investigated for improvement in filtering ability through manipulation of the pole length. The findings reveal reduced confinement losses as low as 0.0003 dB/km for filtered and 0.0054 dB/km for unfiltered wavelengths yielding enhanced loss modulation depth.
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Siddiqui et al. (2025) studied this question.
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