Inverse-Gaussian-Apodized Fiber Bragg Grating for Dual Wavelength Lasing

TL;DR

This paper introduces an inverse-Gaussian apodized fiber Bragg grating that enables simple, low-cost dual-wavelength fiber laser operation with stable emission and controllable wavelength spacing.

Contribution

It proposes and fabricates a novel inverse-Gaussian apodized FBG that achieves stable dual-wavelength lasing in a fiber laser system.

Findings

Stable dual-wavelength emission with 0.146 nm spacing

Controllable dual-wavelength transmission peaks

Low-cost, simple implementation

Abstract

A fiber Bragg grating (FBG) with an inverse-Gaussian apodization function is proposed and fabricated. It is shown that such a FBG possesses easily controllable dual-wavelength narrow transmission peaks. Incorporating such a FBG filter in a fiber laser with a linear cavity, stable dual-wavelength emission with 0.146 nm wavelength spacing is obtained. It provides a simple and low cost approach of achieving the dual-wavelength fiber laser operation.