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.
© 2010 Optical Society of America
Original Manuscript: April 23, 2010
Revised Manuscript: July 1, 2010
Manuscript Accepted: July 2, 2010
Published: July 27, 2010
R. Oven, "Extraction of phase derivative data from interferometer images using a continuous wavelet transform to determine two-dimensional refractive index profiles," Appl. Opt. 49, 4228-4236 (2010)