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Appl Opt. 2009 Nov 10;48(32):6188-94. doi: 10.1364/AO.48.006188.

Diode-laser-based high-precision absolute distance interferometer of 20 m range.

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  • 1Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, D-38116 Braunschweig, Germany. Florian.Pollinger@ptb.de

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.

PMID:
19904315
[PubMed]
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