Refractive index measurements in absorbing media with white light spectral interferometry

Thin-film thickness profile and its refractive index measurements by dispersive white-light interferometry.

As an extension of the authors' previous report of Ref 1, we describe an improved version of dispersive white-light interferometry that enables us to measure the tomographical thickness profile of a thin-film layer through Fourier-transform analysis of spectrally-resolved interference signals. The group refractive index can also be determined without prior knowledge of the geometrical thickness...

Refractive-index measurement of absorbing condensed media.

Dispersion measurements with white-light interferometry

White-light interferograms provide a simple, accurate, and physically intuitive picture of what happens to broadband optical pulses on transmission through, or reflection from, common optical materials. Quantitative measurement of group delay are made with an accuracy of 60.1 fs and with high spectral resolution. This measurement accuracy is applied to the determination of d2nydl2 and d3nydl3 o...

Spectrally Resolved White Light Interferometry for Simultaneous Measurement of the Refractive Index and Thickness

Study of the interference effects in the space-frequency domain is substantially different from the study in the space-time domain though the basic equations are similar in their form. Recently, there is been an increasing interest in the theoretical and experimental investigations of number of coherence phenomena in the spacefrequency domain [1,2]. As has already been amply discussed and demon...

Moiré interferometry with white light.

While high-sensitivity moiré interferometry requires monochromatic light, an auxiliary compensator grating removes the requirement. Experimental verification utilized white light for moiré interference of sensitivity 0.833 microm/fringe. Configurations readily amenable to compensation include moiré fringe multiplication by even factors and the minimum-deviation arrangement. Chromatic compensati...