title: Diode-laser-based high-precision absolute distance interferometer of 20 m range.
abstract: We present a hybrid absolute distance measurement method that is based on a combination of frequency sweeping, variable synthetic, and two-wavelength, fixed synthetic wavelength interferometry. Both experiments were realized by two external cavity diode lasers. The measurement uncertainty was experimentally and theoretically demonstrated to be smaller than 12 microm at a measurement distance of 20 m.
authors.affiliation: Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, D-38116 Braunschweig, Germany. Florian.Pollinger@ptb.de
authors.forename: Florian
authors.initials: F
authors.lastname: Pollinger
authors.forename: Karl
authors.initials: K
authors.lastname: Meiners-Hagen
authors.forename: Martin
authors.initials: M
authors.lastname: Wedde
authors.forename: Ahmed
authors.initials: A
authors.lastname: Abou-Zeid