Study of optical phase change measurement using the Hilbert Transform and interferometric techniques
2011
Advances in the fields of optics and optical communications have created a demand for effectively measuring
relative phase changes along an optical path or within an optical system. We present a method for obtaining these
measurements using an interferometric setup with processing involving Empirical Mode Decomposition and the
Hilbert Transform. In this work, the Hilbert Transform algorithm is justified by accurately measuring the phase
changes in software generated signals. Progress and improvements are shown regarding the ongoing design and
implementation of an experimental benchtop setup. This testbed will prove the method in applications such as
measuring and recording phase changes caused by propagating light through a turbulent freespace channel.
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