Analytical analysis of coherent combining of ultrashort laser pulses
2012
Coherent combining is a novel approach to scale the performance of laser amplifiers. The use of ultrashort pulses in a
coherent combining setup results in new challenges compared to continuous wave operation or to pulses on the
nanosecond timescale, because temporal and spectral effects such as self-phase modulation, dispersion and the optical
path length difference between the pulses have to be considered. In this paper the impact of these effects on the
combining process has been investigated and simple analytical equations for the evaluation of this impact have been
obtained. These formulas provide design guidelines for laser systems using coherent combining.
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