Single-frequency, pulsed Yb 3+ -doped multicomponent phosphate power fiber amplifier

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 t...

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Bibliographic Details
Published in:Journal of optics (2010) 2020-11, Vol.22 (11), p.115606
Main Authors: Balliu, Enkeleda, Boetti, Nadia G, Pugliese, Diego, Lousteau, Joris, Engholm, Magnus, Milanese, Daniel, Nilsson, Hans-Erik
Format: Article
Language:English
Subjects:
high-power
single-frequency
single-stage master-oscillator power fiber amplifier
Yb-doped phosphate fiber
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Summary: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.
ISSN:2040-8978
2040-8986
2040-8986
DOI:10.1088/2040-8986/abbb5f