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Multiplexed demodulation of quasi-static measurands without a receiving interferometer

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2 Author(s)
C. McGarrity ; Phys. Lab., Kent Univ., Canterbury, UK ; D. A. Jackson

The classical technique of dual wavelength interferometry is used to determine the absolute OPD of very short cavities using a parametric plot of the relative interferometric intensities. A network of eight sensors is demonstrated with phase resolution of 1.5 mrad corresponding to 0.2 nm with an unambiguous range of 114 μm

Published in:

Electronics Letters  (Volume:32 ,  Issue: 13 )