Measurement of the Temporal Coherence of a Seeded GRIP Transient Mo Soft X-ray Laser

Abstract

AbstractWe present the results of an experiment performed at the NSF Center for EUV Science and Technology (Colorado State University) in which a wavefront division interferometer was used to investigate the temporal coherence of seeded and unseeded GRIP transient Mo X-ray laser emitting at 18.9 nm. We find that the coherence time of the X-ray laser pulse is of the order of 1.7 ps in the ASE mode and slightly smaller when the amplifier is seeded with a high-order harmonic pulse. The spectral linewidth is subject to a gain narrowing when increasing the length of the plasma amplifier. Such behaviour is consistent with another experiment performed with the OFI seeded Ni-like krypton X-ray laser, using the same interferometer.KeywordsCoherence LengthSpectral ProfilePath DifferenceTemporal CoherenceFringe VisibilityThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.