Grating-eliminated no-nonsense observation of ultrafast incident laser light e-fields (GRENOUILLE) is an ultrashort pulse measurement technique based on frequency-resolved optical gating (FROG). The acronym was chosen because of the technique`s relationship to FROG; grenouille is French for frog. In the above equation, the TBP has been assumed to.... Found on http://en.wikipedia.org/wiki/GRENOUILLE