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Spatiospectral features of a soliton-assisted random laser in liquid crystals

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Original languageEnglish
Pages (from-to)3574-3577
Number of pages4
JournalOptics Letters
Issue number14
Publication statusPublished - 2019
Publication typeA1 Journal article-refereed


We report on novel features of random lasers assisted by near-infrared spatial solitons in nematic liquid crystals. Specifically, we study the role of light-induced reorientational waveguides (nematicons) on the spatial and spectral distributions of the laser modes. We show that the spatially spiky character of the laser emission propagating backwards with respect to the pump tends to disappear in the forward direction, due to the soliton confinement of the generated light. Moreover, the spectral features associated with various random laser resonances appear to merge upon guided-wave propagation along the nematicon, making the nematicon-aided random laser a bidirectional device with distinct emission properties at the two opposite outputs.

Publication forum classification

Field of science, Statistics Finland