重庆欧胜德光电科技有限公司

Researchers at Jena University in Germany proposed a 10kW coherent combined ultrafast fiber laser system

Precision material processing on an industrial scale requires high-power ultrafast lasers, such as the production of solar cells and lithium batteries. Fiber laser is very suitable for coherent beam combination because of its repeatability and simple setting. So far, researchers have proposed many techniques for coherent beam combination of fiber amplifiers. Here, Michael m ü ller et al. Proposed an ultrafast laser with an average output power of 10.4 kW based on the coherent combination of 12th order refractive index fiber amplifiers. The system emits 254 fs pulses close to the conversion limit at a repetition rate of 80 MHz, and has high beam quality (M2 ≤ 1.2) and 0.56% low relative intensity noise in the frequency range of 1 Hz-1 MHz. Furthermore, the researchers give the analysis of the system output parameters, and discuss the technical limits and further power upgrading potential. This work is published on Optics Letters.

2021-09-27