Shuang Liu

KW-level commercial Ce/Yb Co-doped aluminosilicate fiber

To investigate the laser performance of Ce/ Yb-codoped aluminosilicate (Al2O3-SiO2) binary glass fiber, we took commercial Nufern-20/400-9M fiber as a research object. 0.95 kW laser output power at 1066 nm with an optical-to-optical efficiency of 83.3% was achieved at fiber laser amplifier stage. Beam quality of Mx2 and My2 is 1.56 and 1.68 at 0.95 kW, respectively. The results indicate Nufern-20/400-9M fiber may be suitable

kW-level commercial Yb-doped aluminophosphosilicate ternary laser fiber

Based on a master oscillator power amplifier configuration, laser performance of commercial Nufern-20/400-8M Ybdoped aluminophosphosilicate ternary laser fiber was investigated. Pumped by 976 nm laser diodes, 982 W laser output power was obtained with a slope efficiency of 84.9%. Spectrum of output was centered at 1066.56nm with 3dB bandwidth less than 0.32 nm, and the nonlinearity suppression ratio was more than 39dB. Beam quality of Mx2 and M2y were 1.55 and 1.75 at 982 W, respectively. The laser performance indicated that Nufern-20/400-8M Yb-doped aluminophosphosilicate ternary laser fiber is highly competitive for industry fiber laser use.

Fluorescence Distorted Absorption Phenomenon of Yb-doped Double-clad Laser Fiber

The influence of fluorescence on the absorption measurement of Yb-doped double-clad fiber was studied. The results show that the 976 nm fluorescence leads to a linear but slight decrease of absorption coefficient at 976 nm.

6kW GTWave Fiber Amplifier

We fabricated and reported a GTWave fiber amplifier that allowed for 8.43 kW aggregated pump power. GTWave fiber presented 6 kW laser output with optical-to-optical efficiency of 69.8% without any evidence of roll-over.