A Directly-Written Monolithic Waveguide-Laser Incorporating a DFB Waveguide-Bragg Grating

TL;DR

This paper presents the first fabrication of a monolithic waveguide-laser in the C-band using femtosecond laser direct-write technology, integrating a Bragg grating in a doped phosphate glass host.

Contribution

It introduces a novel single-step fabrication method for a monolithic waveguide-laser with integrated Bragg grating in the C-band.

Findings

Lased at 1537 nm with a bandwidth under 4 pm

Successfully fabricated in a single processing step

Operates in the C-band with direct-write technique

Abstract

We report the fabrication and performance of the first C-band directly-written monolithic waveguide-laser. The waveguide-laser device was created in an Erbium and Ytterbium doped phosphate glass host and consisted of an optical waveguide that included a distributed feedback Bragg grating structure. The femtosecond laser direct-write technique was used to create both the waveguide and the waveguide-Bragg grating simultaneously and in a single processing step. The waveguide-laser was optically pumped at approximately 980 nm and lased at 1537nm with a bandwidth of less than 4 pm.