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Extended-range interferometry using a coherence-tuned, synthesised dual-wavelength technique with multimode fibre links

Extended-range interferometry using a coherence-tuned, synthesised dual-wavelength technique with multimode fibre links

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We describe in the letter a technique for making extended-range interferometric measurements with a coherence multiplexed system by means of a variation on the dual-wavelength technique. The interferometer is illuminated with a single source and the two wavelengths are synthesised at the output by means of an interference filter.

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