title: Measurement of group delay with high temporal and spectral resolution.
abstract: We have developed a technique to measure the group-delay time of optical components with a temporal resolution of +/-0.1 fsec and a spectral resolution of 0.1 nm over the spectral region 600-640 nm. The group delay is determined from a measurement of the optical path length through the component as a function of wavelength with a phase-locked interferometer.
authors.forename: M
authors.initials: M
authors.lastname: Beck
authors.forename: I A
authors.initials: IA
authors.lastname: Walmsley