Long period fiber gratings induced by mechanical resonance

TL;DR

This paper introduces a robust, tunable method for fabricating long period fiber gratings using mechanical vibrations, enabling complex designs and fiber property analysis.

Contribution

A novel, simple technique for writing long period fiber gratings via mechanical resonance, allowing real-time tuning and multiple gratings creation.

Findings

Method achieves low polarization dependent losses.

Enables real-time control of grating parameters.

Used to measure Young's modulus of fibers.

Abstract

We present a simple, and robust method for writing long period fiber gratings with low polarization dependent losses. Our method is based on utilizing mechanical vibrations of the tapered fiber while pooling it. Our method enables real-time tunability of the periodicity, efficiency and length of the grating. We also demonstrate complex grating by writing multiple gratings simultaneously. Finally, we utilized the formation of the gratings in different fiber diameters to investigate the Young's modulus of the fiber.