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Recent developments in fiber optic spectral white-light interferometry

DOI: 10.1007/s13320-010-0014-z

Keywords: Optical fiber sensors,white-light interferometry,optical path difference,fiber Fabry-Perot tunable filter,extrinsic Fabry-Perot interferometer

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Recent developments in spectral white-light interferometry (WLI) are reviewed. Firstly, the techniques for obtaining optical spectrum are introduced. Secondly, some novel measurement techniques are reviewed, including the improved peak-to-peak WLI, improved wavelength-tracking WLI, Fourier transform WLI, and 3 × 3 coupler based WLI. Furthermore, a hybrid measurement for the intensity-type sensors, interferometric sensors, and fiber Bragg grating sensors is achieved. It is shown that these developments have assisted in the progress of WLI.


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