Dual-Core Antiresonant Fiber Based Compact Broadband Polarization Beam Splitter

In the following article, we suggest a hollow dual-core antiresonant fiber design that acts as a polarization splitter. The proposed splitter is designed with single layer cladding structure where two elliptical elements admit two separate symmetrical cores. The designed fiber provides an excellent splitting performance including a very compact length of 2.14 cm and the largest extinction ratio of 145 dB at 1.55 µm. It supports an ample bandwidth of 445 nm by retaining an extinction ratio of greater than 20 dB, covering two popular communication windows. It achieves a higher order mode extinction ratio of 225 that offers an effective single mode activity. Therefore, the broad bandwidth and compact length of the suggested polarization splitter possibly make it a potential candidate in optical communication networks.