Impact of Cladding Rectangular Bars on the Antiresonant Hollow Core Fiber

Abstract

The effects of the number of rectangular bars in the cladding of an antiresonant hollow core fiber are well discussed, in this work, to optimize the fiber geometry. Adding rectangular bars within the elliptical tubes results in more antiresonant element layers, hence, the fiber maintains stunning accomplishments: a minimal leakage loss of 6.45×10−4 dB per km at 1.50 μm wavelength by keeping a leakage loss of < 6×10−3 dB per km over 250 nm bandwidth (1.32 μm to 1.57 μm). The presented fiber also reports a low bend loss of 9.0×10−3 dB per km for 12 cm bend radius at the same wavelength and an excellent higher order mode extinction ratio of 5.47×103 by having higher than 150 value over the telecom band. The above achievements lead our fiber better than the recently related reported fibers.