title: Highly sensitive dispersion measurement of a high-power passive optical resonator using spatial-spectral interferometry.
abstract: We apply spatially and spectrally resolved interferometry to measure the complex ratio between the field circulating inside a high-finesse femtosecond enhancement cavity and the seeding field. Our simple and highly sensitive method enables the measurement of single-round-trip group delay dispersion of a fully loaded cavity at resonance for the first time. Group delay dispersion can be determined with a reproducibility better than 1 fs2 allowing the investigation of nonlinear processes triggered by the high intracavity power. The required data acquisition time is less than 1 s.
authors.affiliation: Fraunhofer Institute for Physical Measurement Techniques IPM, Department of Terahertz Measurement and Systems, Erwin-Schroedinger-Str, Building 56, 67663 Kaiserslautern, Germany. daniel.molter@ipm.fraunhofer.de
authors.forename: Ioachim
authors.initials: I
authors.lastname: Pupeza
authors.forename: Xun
authors.initials: X
authors.lastname: Gu
authors.forename: Ernst
authors.initials: E
authors.lastname: Fill
authors.forename: Tino
authors.initials: T
authors.lastname: Eidam
authors.forename: Jens
authors.initials: J
authors.lastname: Limpert
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann
authors.forename: Ferenc
authors.initials: F
authors.lastname: Krausz
authors.forename: Thomas
authors.initials: T
authors.lastname: Udem
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000295:instrumentation; D007368:Interferometry / Q000295:instrumentation*; D055096:Optical Devices; D014159:Transducers