Radially Polarized Conical Beam from an Embedded Etched Fiber

TL;DR

This paper presents a novel method to generate and control a radially polarized conical beam from an etched two-mode fiber, enabling stable polarization transmission for various applications.

Contribution

It introduces a new technique combining chemical etching and polarization control to produce a stable, radially polarized conical beam from an embedded fiber.

Findings

High conversion efficiency of guided mode to refracted beam

Stable radial polarization transmitted through fiber

Low diffraction of the generated beam

Abstract

We propose a method for producing a conical beam based on the lateral refraction of the TM01 mode from a two-mode fiber after chemical etching of the cladding, and for controlling its radial polarization. The whole power of the guided mode is transferred to the refracted beam with low diffraction. Polarization control by a series of azimuthal detectors and a stress controller affords the transmission of a stabilized radial polarization through an optical fiber. A solid component usable for many applications has been obtained.