Strictly all-fiber picosecond Ytterbium fiber laser utilizing chirped-fiber-Bragg-gratings for dispersion control

TL;DR

This paper presents a compact all-fiber picosecond Ytterbium laser using chirped fiber-Bragg-gratings for dispersion management, achieving stable mode-locking and high power output with numerical validation.

Contribution

It introduces a novel all-fiber Ytterbium laser design with chirped fiber-Bragg-gratings for dispersion control and spectral filtering, enhancing stability and performance.

Findings

Achieved stable mode-locking with a chirped fiber-Bragg-grating.

Produced 3.8 ps pulses at 1064 nm with 1.2 W power.

Numerical simulations agree with experimental results.

Abstract

A compact, strictly all-fiber, picosecond pulse source based on ytterbium (Yb) doped fiber is described. Stable solitary mode-locking is obtained in a fiber-oscillator utilizing a carefully designed chirped fiber-Bragg-grating (C-FBG) for both dispersion control and spectral filtering. Self-starting is assured through the use of a fiber-coupled semiconductor-saturable-absorber-mirror (SESAM). The oscillator's 50MHz 3.8ps pulse-train output at 1064nm wavelength is amplified to 1.2W average power by an Yb doped fiber-amplifier, yielding 6.45ps parabolic pulses. Numerical simulations of the fiber oscillator design based on the modified nonlinear Schrodinger equation (NLSE), agree well with the experimental results.