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 $12\mathrm{\mu m}$ at a measurement distance of $20\mathrm{m}$.

© 2009 Optical Society of America

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