Abstract
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 . 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.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
Long Huang, Hanshuo Wu, Ruixian Li, Lei Li, Pengfei Ma, Xiaolin Wang, Jinyong Leng, and Pu Zhou
Opt. Lett. 42(1) 1-4 (2017)
Thomas Theeg, Christoph Ottenhues, Hakan Sayinc, Jörg Neumann, and Dietmar Kracht
Opt. Lett. 41(1) 9-12 (2016)
Benjamin Pulford, Roger Holten, Turghun Matniyaz, Monica T. Kalichevsky-Dong, Thomas W. Hawkins, and Liang Dong
Opt. Lett. 46(18) 4458-4461 (2021)