Direct measurement of group delay of optical elements

doi:https://doi.org/10.7498/aps.60.028102

Direct measurement of group delay of optical elements

Yuqiang Deng,Qing Sun,Jing Yu-2011-01-01-Acta Physica Sinica

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TL;DRAbstract

A technique for direct measurement of group delay of optical elements is introduced. With the joint time-frequency analysis of white-light spectral interferogram, group delay can be directly extracted from the ridge of wavelet-transform. The technique is accurate and simple. The measurement results of group delay and group delay dispersion of a piece of fused silica was demonstrated. The results agree well with those from theoretical calculation, and the noise is greatly reduced. This technique is suitable for various application of white-light interferometer.

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A technique for direct measurement of group delay of optical elements is introduced. With the joint time-frequency analysis of white-light spectral interferogram, group delay can be directly extracted from the ridge of wavelet-transform. The technique is accurate and simple. The measurement results of group delay and group delay dispersion of a piece of fused silica was demonstrated. The results agree well with those from theoretical calculation, and the noise is greatly reduced. This technique is suitable for various application of white-light interferometer.

Keywords

Group delay and phase delayOpticsGroup delay dispersionInterferometryWhite light interferometryDispersion (optics)PhysicsComputer science

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