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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1994),
  • paper CTuJ3

Photorefractive and thermal fixing properties of 4 mol% MgO-doped lithium niobate

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Abstract

It has been shown that appropriate doping levels of lithium rich lithium niobate with magnesium oxide significantly reduces the photorefractive effect via an increase in the crystal's photoconductivity with little change in its photovoltaic current.1 We have observed a favorably different effect in samples where the magnesium oxide levels are near 4 mol%. In such samples there exists a relatively strong photorefractive effect yet a relatively weak photovoltaic effect. As well, we observed photo-induced grating reconfiguration times significantly shorter than in most forms of lithium niobate. These unique room temperature photorefractive characteristics induced us to further study how these crystals behave during thermal holographic fixing processes.

© 1994 Optical Society of America

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