Easy and straightforward construction of wideband phase-shifting algorithms for interferometry.
We show a practical way for building wideband phase-shifting algorithms for interferometry. The idea presented combines first- and second-order quadrature filters to obtain wideband phase-shifting algorithms. These first- and second-order quadrature filters are analogous to the first- and second-order filters commonly used in communications engineering, named building blocks. We present a systematic way to develop phase-shifting algorithms with large detuning robustness or large bandwidth. In general, the approach presented here gives a powerful frequency analysis and design tool for phase-shifting algorithms robust to detuning for interferometry.
Centro de Investigaciones en Optica Asociacion Civil, León Guanajuato 20036, México. jcesar_estrada@hotmail.com
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