Date: February 20th, 2002
Attendees: Erika, Virginio, Luca, Matt, Biplab (Caltech)
Erika D'Ambrosio gave a talk on Optics and perturbation theory focussing on the characteristics of the eigenmodes of a composite system when the perturbations conserve energy and when they do not. Such expected features are taken into account by the formalism of perturbation theory that also puts a quantitative limit on how large a distortion can be (before the modes become so mixed that we cannot rely on a finite number of unperturbed modes in order to estimate the distortions of the fields). This limit is the frequency spacing between the "unperturbed cavity modes" that we want to use for representing the operators and it means that very small distortions can be treated in this way for nearly degenerate cavities.
Virginio Sannibale reported a bug in MSE code.
Biplab explained some tests that he's doing to understand relationship between mode mismatch at mirrors and the guoy phase difference between a matched and a mismatched beam.
Any comments? write to bbhawal@ligo.caltech.edu