Retrieving the phase of diffraction orders generated with tailored gratings
| Autor: | Esther Nabadda, María del Mar Sánchez-López, Pascuala García-Martínez, Ignacio Moreno |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Optics Letters. 48:267 |
| ISSN: | 1539-4794 0146-9592 |
| DOI: | 10.1364/ol.479354 |
| Popis: | A technique is performed to quantitatively evaluate the intensity and phase of the diffraction orders generated by tailored phase gratings displayed onto a liquid-crystal spatial light modulator (LC-SLM). The SLM displays the grating together with a lens to obtain the Fourier transform. The setup is converted into a polarization common-path interferometer by simply rotating a polarizer. This configuration allows a phase-shifting interferometry algorithm to be applied to retrieve the phase of the diffraction orders. The quadratic phase arising in the system, which must be subtracted, is calibrated using triplicator gratings of varying periods. Various tailored designs with controlled phase shift between diffraction orders are experimentally tested to prove the advantage and simplicity of the technique. |
| Databáze: | OpenAIRE |
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