期刊
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
卷 5, 期 3, 页码 250-255出版社
IOP PUBLISHING LTD
DOI: 10.1088/1464-4258/5/3/317
关键词
spatial solitons; liquid crystals; thermal non-linearity
类别
We describe an experimental approach to measure the actual size of a narrow beam interacting non-linearly with a liquid crystal medium and experiencing a quasi-soliton-like propagation. We show that it is possible to accurately record the beam shape in two dimensions and at different stages of the self-focusing process by introducing within the sample itself a probe fibre as a detector and by scanning it across the beam profile. We discuss the influence of the probe fibre on the temperature distribution and the self-waveguiding process.
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