What equipment is used for two-dimensional IR spectroscopy and how can the molecular structure of a compound be resolved? On the Wikipedia page about two-dimensional IR spectroscopy it is said that 2D IR spectroscopy can be used to study the 


  molecular dynamics with femtosecond time resolution.


According to Wikipedia it 


  has for example been used successfully to study hydrogen bond forming and breaking and to determine the transition state geometry of a structural rearrangement in an iron carbonyl compound.


Now I'm curious. What equipment is necessary to perform 2D IR experiments? Does somebody have experience with 2D IR spectroscopy and could explain how the geometry of the system is inferred just from the (2D) IR spectrum.
You can find a schematic drawing of the box-CARS 2D IR setup in the publication 
Enhancing signal detection and completely eliminating scattering using quasi-phase-cycling in 2D IR experiments, Robbert Bloem, Sean Garrett-Roe, Halina Strzalka, Peter Hamm, Paul Donaldson

https://pdfs.semanticscholar.org/e134/cdbb98a8d899a17848f8242c8160d4913f0f.pdf