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

Author:

Balliu EnkeledaORCID,Boetti Nadia GORCID,Pugliese DiegoORCID,Lousteau JorisORCID,Engholm MagnusORCID,Milanese DanielORCID,Nilsson Hans-ErikORCID

Abstract

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.

Funder

EU Regional Funds

Interdepartmental Center PhotoNext of Politecnico di Torino

Knowledge Foundation

Publisher

IOP Publishing

Subject

Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

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