Erbium-doped aluminophosphosilicate all-fiber laser operating at 1584 nm

TL;DR

This paper presents a high-power all-fiber laser operating at 1584 nm using erbium-doped aluminophosphosilicate fiber, achieving 25 W output with a simple cavity design and efficient doping.

Contribution

It introduces a novel erbium-doped aluminophosphosilicate fiber with high erbium concentration and a straightforward fiber Bragg grating cavity for efficient laser operation.

Findings

25 W output power at 1584 nm

30% slope efficiency relative to absorbed pump power

Single-mode operation with simple cavity design

Abstract

We report on an ytterbium-free erbium-doped aluminophosphosilicate all-fiber laser, producing an output power of 25 W at a wavelength of 1584 nm with a slope efficiency of 30% with respect to the 976 nm absorbed pump power. The simple cavity design proposed takes advantage of fiber Bragg gratings written directly in the gain fiber. The single-mode erbium-doped aluminophosphosilicate fiber was fabricated in-house and was doped with 0.06 mol.% of Er2O3, 1.77 mol.% of Al2O3 and 1.04 mol.% of P2O5. The incorporation of aluminium and phosphorus into the fiber core allowed for an increased concentration of erbium without inducing significant clustering, while keeping the numerical aperture low to ensure a single-mode laser operation.