Related Experiment Video
Updated: Jun 19, 2026

16:11
Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
Abstract:
We demonstrate distance measurement by varying, or chirping, the synthetic wavelength in a two-color laser diode interferometer. An absolute accuracy of 3 microm is achieved over a 200-mm range, without the phase ambiguities or optical complexities normally associated with synthetic-wavelength interferometry. The fibercoupled experimental system uses a 25-microW, 0.25-mm-diameter collimated object beam and can be used for dimensional gauging and rough-surface profiling.

