Single-mode 3kW Ytterbium fiber amplifier with diffraction-limited divergence in all-fiber format and compact modular package

Nikolai Platonov; Roman Yagodkin; Joel De La Cruz; Valentin Gapontsev

doi:10.1117/12.2578845

5 March 2021 Single-mode 3kW Ytterbium fiber amplifier with diffraction-limited divergence in all-fiber format and compact modular package

Nikolai Platonov, Roman Yagodkin, Joel De La Cruz, Valentin Gapontsev

Author Affiliations +

Proceedings Volume 11665, Fiber Lasers XVIII: Technology and Systems; 1166505 (2021) https://doi.org/10.1117/12.2578845
Event: SPIE LASE, 2021, Online Only

Abstract

We report 3kW test data of Single-Mode (SM) Ytterbium-doped fiber amplifier with diffraction-limited divergence for narrow linewidth seed sources in compact modular package with all-fiber format. Measured M² values of output beam in full power range are < 1.1. The fiber amplifier has been pumped by direct laser diodes and has 3m output delivery cable terminated with IPG connector. The fiber amplifier in modular package has ≥ 40% wall-plug efficiency and 15nm spectral bandwidth in 1055-1070nm wavelength range. The amplifier operates up to 3kW at linewidths of 60GHz and 30GHz with polarized and depolarized seed sources respectively. The amplifier data and non-linear SBS, SRS and MI effects are discussed for different input linewidth and test conditions.

Conference Presentation

Citation Download Citation

Nikolai Platonov, Roman Yagodkin, Joel De La Cruz, and Valentin Gapontsev "Single-mode 3kW Ytterbium fiber amplifier with diffraction-limited divergence in all-fiber format and compact modular package", Proc. SPIE 11665, Fiber Lasers XVIII: Technology and Systems, 1166505 (5 March 2021); https://doi.org/10.1117/12.2578845

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