All-fiber controller of radial polarization using a periodic stress

TL;DR

This paper presents a novel all-fiber device that uses periodic stress to control and generate radial polarization modes, specifically targeting the complex annular mode family, enabling mode conversion at fiber ends.

Contribution

It introduces a simple, fiber-based method employing periodic perturbation for radial polarization control in complex mode families, extending stress-based techniques beyond fundamental modes.

Findings

Successfully generates radially polarized TM01 mode using fiber-based device

Achieves mode conversion at fiber extremities with classical crystalline plates

Demonstrates control over complex annular modes in fiber optics

Abstract

Our aim is to transpose the polarization control by mechanical stress usually applied to single mode fibers, to the (TM01, TE01,HEev21,HEod21) annular mode family. Nevertheless, the quasi degeneracy of these four modes makes the situation more complex than with the fundamental mode HE11. We propose a simple device based on periodic perturbation and mode coupling to produce the radially polarized TM01 mode or at least one single of the four modes at the extremity of an arbitrarily long fiber, the conversion to TM01 mode being achievable by classical crystalline plates.