HYBRID FIBER PRE-AMPLIFIER AND THIN DISK MULTIPASS POWER AMPLIFIER

摘要

A master oscillator power-amplifier stages includes multiple stages of fiber-amplification (34, 54, 58) with a final power amplifier stage in the form of a multi-pass amplifier (64). With a thin-disk gain medium (66) in one example the thin-disk amplifier includes a common optical arrangement (74, 76, 78, 120) for providing multiple incidences of radiation to be amplified and multiple incidences of a pump - radiation beam (70) on the thin-disk gain medium (66). The use of a thin-disk power amplifier allows to avoid non-linear pulse broadening, circumvents the need for a CPA while keeping the footprint of the MOPA small.