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Appl Opt. 2010 Aug 1;49(22):4228-36. doi: 10.1364/AO.49.004228.

Extraction of phase derivative data from interferometer images using a continuous wavelet transform to determine two-dimensional refractive index profiles.

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  • 1School of Engineering and Digital Arts, The University of Kent, Canterbury,Kent, CT2 7NT, UK.


Two-dimensional refractive index profiles of ion exchanged channel waveguides in glass have been obtained from the analysis of interferometer data. To obtain depth data, a shallow bevel is produced in the glass by polishing. The refractive index profile information that is contained within the derivative of the phase data is extracted directly using a continuous wavelet transform algorithm. The algorithm used to characterize and smooth the wavelet ridge is discussed in detail.

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