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21 June 2019 Phase dispersion measurement on laser mirrors using fringe free spectral interferometry
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Abstract
We present a novel method for measuring the spectral phase of laser mirrors, where fringe free spectrally resolved interferograms are recorded, and a simple arcus cosine transformation is used to retrieve the spectral phase from the normalized interferograms. The method does not require time delay correction during the evaluation of the interferograms. Group-delay dispersion of a silver and a high reflection mirror is measured to test the precision of the method and it is compared with the precision provided by the cosine function fit and the Fourier-transform method.
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K. Csonti, G. Mészáros, and A. P. Kovács "Phase dispersion measurement on laser mirrors using fringe free spectral interferometry", Proc. SPIE 11057, Modeling Aspects in Optical Metrology VII, 110571C (21 June 2019); https://doi.org/10.1117/12.2525800
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