High-energy nanosecond pulse extraction in a 40 µm core REPUSIL erbium-doped PM fiber: modeling and experiment
Year: 2026
Type: article
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.
Source: Applied Optics
DOI: 10.1364/ao.608109
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7170064925