Patent ID: 8665446
Filing Date: 2014-03-04
Classification: G01J

Abstract:
1. An apparatus for coherent multi-dimensional optical spectroscopy, comprising an optical assembly, wherein the optical assembly comprises: detection means for detecting an interference signal of the at least third order signal and the fourth pulse, wherein: the means for splitting the base light pulse include non-diffractive optics, the optical assembly is configured such that the light pulses between entrance of the base light pulse into the optical assembly and the focusing optics are at least for part of their optical paths guided pairwise in such a manner that changes in an optical path length due to a vibration of the means for splitting the base light pulse or due to an intentional variation using the delay means are, at least to a first order, identical for pulses of each pair, and the pulse pairs are chosen such that effects that the change in the arrival times of the pulses of each pair, due to a change in the optical path length have on the phase of the interference signal, at least partly compensate each other.