N Haarlammert

Narrow linewidth, single mode 3 kW average power from a directly diode pumped ytterbium-doped low NA fiber amplifier.

A. Tünnermann, R. Eberhardt, S. Kuhn, 2016, Optics express.

Single mode 4.3 kW output power from a diode-pumped Yb-doped fiber amplifier.

J. Limpert, A. Tünnermann, R. Eberhardt, 2017, Optics express.

Modal content measurements (S2) of negative curvature hollow-core photonic crystal fibers.

A. Tünnermann, R. Eberhardt, O. de Vries, 2017, Optics express.