The optical elongation of lightguides in photopolymerizable compositions

We have studied the possibility of forming a waveguide channel in a transparent weakly absorbing photopolymerizable composition by an optical method based on the self-channeling of a radiation emitted from the edge of an optical fiber. The influence of the directivity pattern of emission from the fiber edge (i.e., of the radiation mode composition) on the channel formation is considered. In the experiment, the length of a multimodal optical fiber with a diameter of 50 μm was increased by up to 1 cm.