Journal
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Volume 375, Issue -, Pages 631-640Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10587250210613
Keywords
thermal lensing; self-waveguiding; optical soliton; non-locality
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In this paper we report on experiments performed to estimate the nonlocality of the photothermal non-linearity in thick dye-doped nematic liquid crystal (DDNLC). We have studied the interaction of two counter-propagating self-focused laser beams parallel to each other. From this experiment, a rough estimation of the width of the induced index profile with respect to the beam size is derived (non-locality). In a second part, we report a set of results concerning the tuning of this nonlocality. As the laser light is chopped and for power large enough, the beam is self-trapped in a narrow isotropic channel, the length of which depends on the input power. We describe an original experiment of self-guiding of light by the use of such an effect, namely bent isotropic channels.
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