High-energy nanosecond pulse extraction in a 40  µm core REPUSIL erbium-doped PM fiber: modeling and experiment.

Authors

S Vidal, V Freysz, M Zambelli, Y Leventoux, R Jamier, P Roy, K Wondraczek, M Castaing

Published in

Applied optics. Volume 65. Issue 23. Pages 7979-7986. Aug 10, 2026.

Abstract

We report on a polarization-maintaining (PM) very large mode area (VLMA) Er-doped fiber with a 40 µm hexagonal core, fabricated via the REPUSIL powder process. The fiber's performance was evaluated in a MOPA configuration under 976 nm cladding-pumping and 1480 nm core-pumping. A numerical model, distinguishing between isolated ions and clusters to account for cooperative up-conversion and pair-induced quenching, shows excellent agreement with experimental results. This validated model provides a robust tool for designing high-energy, eye-safe PM-VLMA fiber amplifiers.

PMID:
42593470
Bibliographic data and abstract were imported from PubMed on 13 Aug 2026.

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