A new method of electrical fixing in strontium-barium niobate crystals
Publication date
2001
Document type
Conference paper
Author
Organisational unit
Universität Osnabrück
ISBN
Conference
Photorefractive Effects, Materials, and Devices 2001
Series or journal
OSA trends in optics and photonics : TOPS
Part of the university bibliography
Nein
Abstract
We suggest a new method of electrical fixing in strontium-barium niobate (SEN) crystals. The method takes advantage of the large difference of the extraordinary refractive index in poled compared to unpoled SEN samples. A SEN crystal that is locally depolarized can guide extraordinarily polarized light inside the depoled crystal areas. A local depoling of the crystal is achieved with the help of light-induced screening of an externally applied electric field. By applying a suitable external electric field, the polarization can be reversed outside the illuminated area, while the reversal inside is prevented. At the boarders between illuminated and non-illuminated regions depolarized areas can form, resulting in waveguiding channels for extraordinarily polarized light.
© 2001 Optical Society of America
© 2001 Optical Society of America
Version
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