Single-frequency, pulsed Yb³⁺-doped multicomponent phosphate power fiber amplifier

Abstract

High-power, single-frequency, pulsed fiber amplifiers are required in light detection and ranging, coherent laser detection, and remote sensing applications to reach long range within a short acquisition time. However, the power-scaling of these amplifiers is limited by nonlinearities generated in the optical fibers, in particular by stimulated Brillouin scattering (SBS). In this regard, the use of multicomponent phosphate glasses maximizes the energy extraction and minimizes nonlinearities. Here, we present the development of a single-stage, hybrid, pulsed fiber amplifier using a custom-made multicomponent Yb-doped phosphate fiber. The performance of the phosphate fiber was compared to a commercial Yb-doped silica fiber. While the latter showed SBS limitation at nearly 6.5 kW for 40 cm length, the maximum achieved output peak power for the multicomponent Yb-doped phosphate fiber was 11.7 kW for 9 ns pulses using only 20 cm with no sign of SBS.

Avaliação das propriedades fotônicas do material fotoluminescente à base de SiO2 e Gd2O3 triplamente-dopado com Er3+/Yb3+/Eu3+ para conversão de energia

“…Materiais contendo Yb 3+ são desenvolvidos para diversas aplicações como termômetros óticos [32][33][34] , fibras óticas 35,36 e, principalmente como sensibilizador no upconversion, devido a sua alta sessão de choque e uma vez que a sua banda de absorção 4 F7/2 → 4 F5/2 é ressonante com a transição 4 H15/2 → 4 I11/2 do íon Er 3+ , permitindo a eficiente transferência de energia entre estes íons [37][38][39] .…”