Optical measurements using the spectral interferograms obtained at the output of the uncompensated Michelson interferometer

Petr Hlubina

doi:10.1117/12.281173

17 September 1997 Optical measurements using the spectral interferograms obtained at the output of the uncompensated Michelson interferometer

Petr Hlubina

Author Affiliations +

Proceedings Volume 3098, Optical Inspection and Micromeasurements II; (1997) https://doi.org/10.1117/12.281173
Event: Lasers and Optics in Manufacturing III, 1997, Munich, Germany

Abstract

The mutual interference of two beams in the spectral domain has been demonstrated experimentally at the output of the uncompensated Michelson interferometer excited by two low- coherence sources having different spectral widths. For the first, a wide-spectrum source, three spectral interferograms with the wavelength-dependent periods of modulation of the source spectrum affected by dispersion of the beamsplitter have been resolved. Using the Fourier transform method for the spectral fringe pattern analysis, good agreement between the experimental and the theoretical spectral interferograms has been achieved and characteristics such as the unmodulated spectra, which agree well with those obtained by blocking one of the arms of the interferometer, and the wavelength dependences of the group optical path differences (OPDs) have been obtained. For the second, a narrow-spectrum source, the spectral interferograms with the wavelength- independent periods of modulation of the source spectrum have been resolved and a cross-correlation procedure between the experimental and theoretical spectral interferograms has been applied in the estimate of the group OPDs between both beams corresponding to different positions of one of the mirrors of the interferometer.

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Petr Hlubina "Optical measurements using the spectral interferograms obtained at the output of the uncompensated Michelson interferometer", Proc. SPIE 3098, Optical Inspection and Micromeasurements II, (17 September 1997); https://doi.org/10.1117/12.281173

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