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Optical Engineering

Self-imaging through incoherent to coherent conversion
Author(s): Maria del Carmen Lasprilla Alvarez; Alexandra Agra Amorim; Myrian C. Tebaldi; Nestor A. Bolognini
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Paper Abstract

The self-imaging phenomenon is realized by utilizing an incoherent to coherent converter. For this purpose, a photorefractive BSO crystal that becomes uniformly birefringent due to an external applied voltage is employed. Then, an incoherently illuminated one-dimensional grating that locally modulates the induced birefringence is registered. In the readout process, a linearly polarized plane wave from a He-Ne laser is utilized. The ellipticity of the light exiting the crystal will be determined according to the local birefringence. Then, after passing through a polarizer, the coherent output will reproduce the incoherent input. In this way, under free propagation, coherent replicas of the grating will be obtained.

Paper Details

Date Published: 1 May 1996
PDF: 6 pages
Opt. Eng. 35(5) doi: 10.1117/1.600700
Published in: Optical Engineering Volume 35, Issue 5
Show Author Affiliations
Maria del Carmen Lasprilla Alvarez, Univ. Industrial de Santander (Colombia)
Alexandra Agra Amorim, Instituto Superior de Engenharia (Portugal)
Myrian C. Tebaldi, Ctr. de Investigaciones Opticas (Argentina)
Nestor A. Bolognini, Centro de Investigaciones Opticas (Argentina)


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