title: Long distance measurement using optical sampling by cavity tuning.
abstract: We experimentally demonstrate a method enabling absolute distance measurement based on optical sampling by cavity tuning. The cross-correlation patterns can be obtained by sweeping the repetition frequency of the frequency comb. The 114 m long fiber delay line, working as the reference arm, is actively stabilized by using a feedback servo loop with 10-10level stability. The unknown distance can be measured via the instantaneous repetition frequency corresponding to the peak of the fringe packet. We compare the present technique with the reference incremental interferometer, and the experimental results show an agreement within 3 μm over 60 m distance, corresponding to 10-8level in relative.
authors.forename: Hanzhong
authors.initials: H
authors.lastname: Wu
authors.forename: Fumin
authors.initials: F
authors.lastname: Zhang
authors.forename: Tingyang
authors.initials: T
authors.lastname: Liu
authors.forename: Petr
authors.initials: P
authors.lastname: Balling
authors.forename: Jianshuang
authors.initials: J
authors.lastname: Li
authors.forename: Xinghua
authors.initials: X
authors.lastname: Qu