Highly Birefringent Low Loss NestedHollow Core Anti-resonant Fiber With A Silicon Layer

Abstract

Abstract In this paper, a single ring hollow-core anti-resonant fiber (HC-ARF) with five elliptical nested tubes and a silicon layer is presented and investigated. The geometrically optimized HC-ARF, proposed here, exhibits highest birefringence of 2.95×10− 4 at 1550 nm by maintaining a birefringence level of > 10− 4 for a bandwidth of 58 nm. The confinement loss of this fiber reaches to a very low value of 7.57×10− 3 dB/m at 1550 nm and sustains a loss of < 0.75 dB/m within the highly birefringent region. A higher order mode extinction ratio of 51, for our fiber, ensures a singlemode operation at 1550 nm.Moreover, the HC-ARF offers low bend loss of 0.08 dB/m at 2 cm of bend radius and the bend loss remains < 0.08 dB/m from 3 cm of bend radius to onwards.