title: Precise measurements of optical cavity dispersion and mirror coating properties via femtosecond combs.
abstract: We precisely determine the dispersion of an optical cavity over a large spectral bandwidth using a broadband optical comb generated by a femtosecond laser. This approach permits the effective characterization of the next generation of mirrors that will offer high reflectivity, minimal absorption/scattering loss, and well-defined dispersion characteristics. Such mirrors are essential for constructing passive, high-finesse cavities capable of storing and enhancing ultrashort pulses and for exploring novel intracavity-based experiments in atomic and molecular spectroscopy and extreme nonlinear optics. We characterize both zero and negative group-delay-dispersion mirrors and compare their performance against the targeted coating design. The high sensitivity of this approach is demonstrated with a precise determination of the group-delay dispersion of air inside a 40-cm long optical cavity, demonstrating an accuracy better than 1 fs2.
authors.forename: Micheal
authors.initials: M
authors.lastname: Thorpe
authors.forename: R
authors.initials: R
authors.lastname: Jones
authors.forename: K
authors.initials: K
authors.lastname: Moll
authors.forename: Jun
authors.initials: J
authors.lastname: Ye
authors.forename: Ramin
authors.initials: R
authors.lastname: Lalezari