title: Absolute distance measurement by dispersive interferometry using a femtosecond pulse laser.
abstract: We describe an interferometric method that enables to measure the optical path delay between two consecutive femtosecond laser pulses by way of dispersive interferometry. This method allows a femtosecond laser to be utilized as a source of performing absolute distance measurements to unprecedented precision over extensive ranges. Our test result demonstrates a non-ambiguity range of ~1.46 mm with a resolution of 7 nm over a maximum distance reaching ~0.89 m.
authors.forename: Ki-Nam
authors.initials: KN
authors.lastname: Joo
authors.forename: Seung-Woo
authors.initials: SW
authors.lastname: Kim