Interferometry based on Lau effect with a grating registered in a photorefractive crystal |
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Authors: | M Tebaldi L Angel Toro N Bolognini |
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Institution: | Centro de Investigaciones Ópticas, CIOp and OPTIMO, Facultad de Ingeniería, Universidad Nacional da La Plata, La Plata, PO Box 124, 1900 La Plata, Argentina |
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Abstract: | The use of a grating in the form of modulation of birefringence in a BSO crystal in a novel Lau interferometer set-up is proposed. The system behaves as a conventional Lau interferometer implemented by using two amplitude gratings. Moreover, it permits control of the visibility and provides a contrast inversion of the interferometric fringes by rotating a polarizer. Two alternative experimental arrangements with similar performance are presented. A theoretical approach is outlined and the predicted behavior is confirmed by results obtained under different experimental conditions. |
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Keywords: | Interferometry Lau fringes Birefringence |
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