400-W near diffraction-limited single-frequency all-solid photonic bandgap fiber amplifier

Description

An ytterbium-doped large-mode area photonic bandgap fiber is used to demonstrate 400 W of single-frequency output at 1064 nm with excellent beam quality and minimal stimulated Brillouin scattering. The fiber possesses all-solid microstructures embedded in the cladding and a core composed of phosphosilicate with a diameter of ∼50  μm. As the signal power is pushed beyond 450 W, there is degradation in the beam quality due to the modal instability. We briefly discuss techniques to alleviate this problem in future designs. To the best of our knowledge, the 400-W single-frequency near diffraction-limited output far exceeds the current state-of-the-art from such type of fiber amplifier.

Publication Date

1-1-2015

Publisher

figshare Academic Research System

DOI

10.6084/m9.figshare.c.3755009

Document Type

Data Set

Identifier

10.6084/m9.figshare.c.3755009

Embargo Date

1-1-2015

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