Abstract
A hollow-core anti-resonant fiber (HC-ARF) design based on hybrid silica/silicon cladding is proposed for single-polarization, single-mode and high birefringence. We show that by adding silicon layers in a semi-nested HC-ARF, one of the polarization states can be strongly suppressed while simultaneously maintaining low propagation loss for other polarization states, single-mode and high birefiringence. The optimized HC-ARF design exhibits propagation loss, high birefringence, and polarization-extinction ratio of 0.05 dB/m, 0.5 × 10-4, >300 respectively for y-polarization while the loss of x-polarization is >5 dB/m at 1064 nm. The fiber also has low bend-loss and thus can be coiled to a small bend radii of 5 cm having ≈0.06 dB/m bend loss.
Highlights
Controlling and preserving the polarization state of light plays a crucial role in many polarizationsensitive optical fiber systems including but not limited to fiber sensors [1], fiber lasers [2], polarization maintaining optical amplifier [3], and fiber based gyroscopes [4]
In this work we present a novel fiber designs that have single-mode, singlepolarization, and high birefringence properties based on a silica/silicon regular and semi-nested hollow-core anti-resonant fiber (HC-ARF) sturctures
The semi-nested tube HC-ARF design has better loss performance, singlemode and polarization extinction ratio compared to the regular HC-ARF structure
Summary
Controlling and preserving the polarization state of light plays a crucial role in many polarizationsensitive optical fiber systems including but not limited to fiber sensors [1], fiber lasers [2], polarization maintaining optical amplifier [3], and fiber based gyroscopes [4]. Polarization maintaining fibers (PMFs) based on solid-core fiber designs have been studied and fabricated over the past few years in which the two polarization states have different propagation constants (β) [5,6] In these fibers, high birefringence (Hi-Bi) is achieved by introducing either stress [5] or anisotropy in the core (e.g., by making the core elliptical) [6]. The first demonstration of Hi-Bi and single-polarization HC-ARF was first proposed by Mousavi et al, [7,33], where multiple nested resonators with different wall thicknesses were used to achieve Hi-Bi with a polarization extinction ratio (PER) of 1000 at 1550 nm. We propose a semi-nested HC-ARF design consisting of a hybrid silica/silicon cladding for achieving single-polarization, single-mode transport, and Hi-Bi at 1064 nm. We found that the semi-nested HC-ARF outperforms the regular HC-ARF under bend condition whereas both fibers show a comparable performance under straight condition
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
