100 kW ultra high power fiber laser
Jiapo Sun, Lie Liu, Lianghua Han, Qixin Zhu, Xiang Shen, Ke Yang
Abstract
Based on the self-developed non-photodarkening large mode field gain fiber and the 976 nm wavelength-locked high-power and high-brightness pump source, and using the secondary fiber power combining technology, a high-performance 100kW fiber laser in China was built, realizing high-order mode and non-linear effect suppression. The maximum output power of the laser can reach 101.65 kW, the center wavelength is 1080 ± 5 nm, the spectral bandwidth is (3dB) 5-8 nm, the output fiber core diameter is 400µm, the beam quality BPP is 19.28 mm*mrad, and the laser power instability is ±1.1%. Its laser non-destructive cladding stripping technology, distortion-free taper technology, inclined multi-die beam combining technology and circular inner cladding modification design have all reached the international advanced level.