Abstract
The non-zero second order susceptibility obtained by poling a glass is generally explained by the creation of a permanent frozen electric field EDC which breaks the centro-symmetry of the glass. Multiplying the third order susceptibility tensor terms by EDC gives rise to second order non zero terms according to the relation (1) So, after a poling process applied to a fiber, a linear (Pockels) non-zero electrooptic coefficient r333 appears.
© 1997 Optical Society of America
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