title: 187 W, 3.7 mJ from spectrally combined pulsed 2 ns fiber amplifiers.
abstract: We report on a spectral combination of four 2 ns pulsed fiber amplifier systems to a total output power of 187 W at a 50 kHz repetition rate resulting in >3.7 mJ of pulse energy and 1.7 MW of pulse peak power. A dielectric reflection grating is used to merge the four individual beams to one output with close to diffraction-limited beam quality independent of the power level. The output characteristics are beyond the capabilities of a single emitter and further scaling in a straightforward way appears to be feasible.
authors.affiliation: Institute of Applied Physics, Friedrich Schiller University Jena, Jena, Germany. oschmidt@iap.uni-jena.de
authors.forename: O
authors.initials: O
authors.lastname: Schmidt
authors.forename: T V
authors.initials: TV
authors.lastname: Andersen
authors.forename: J
authors.initials: J
authors.lastname: Limpert
authors.forename: A
authors.initials: A
authors.lastname: Tünnermann