title: Long term comparison of two fiber based frequency comb systems.
abstract: Mode-locked erbium-doped fiber lasers are ideal comb generators for optical frequency metrology. We compare two fiber frequency combs by measuring an optical frequency independently with both combs and comparing their results. The two frequency measurements agree within 6x10-16. This is to our knowledge the first direct comparison between two fiber based frequency combs.
authors.forename: Philipp
authors.initials: P
authors.lastname: Kubina
authors.forename: Peter
authors.initials: P
authors.lastname: Adel
authors.forename: Florian
authors.initials: F
authors.lastname: Adler
authors.forename: Gesine
authors.initials: G
authors.lastname: Grosche
authors.forename: Theodor
authors.initials: T
authors.lastname: Hänsch
authors.forename: Ronald
authors.initials: R
authors.lastname: Holzwarth
authors.forename: Alfred
authors.initials: A
authors.lastname: Leitenstorfer
authors.forename: Burghard
authors.initials: B
authors.lastname: Lipphardt
authors.forename: Harald
authors.initials: H
authors.lastname: Schnatz