One-dimensional self-focusing in photorefractive Bi12SiO20 crystal: Theoretical modeling and experimental demonstration

Jinn Tsai, Arthur Chiou, Tai Chiung Hsieh, Ken-Yuh Hsu

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We have experimentally demonstrated one-dimensional self-focusing of a laser beam in a photorefractive Bi12SiO20 (BSO) crystal with an externally applied DC field. Fractional change in focal length larger than 50% was measured when the biased field was varied from 2 kV/cm to 8 kV/cm. Based on the band transport model, thin crystal approximation, and gradient index (GRIN) lens approximation, we derive a mathematical expression that describes the effect quantitatively.

Original languageEnglish
Pages (from-to)237-240
Number of pages4
JournalOptics Communications
Issue number4
StatePublished - 15 Apr 1999

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