Three types of microstructured large core fibers: Development and investigation

Large core microstructured fibers are intensively investigated because of their application in the area of laser physics and high-power light transfer to decrease the non-linear processes. In holey fibers with solid glass core single-mode regime becomes the endless one over the spectra and the most suitable manner of core increasing is scaling of the fiber dimensions without any change in the fiber structure. The authors managed to increase the core diameter up to 35 and 50 mum and to obtain the laser generation. In this work we have determined the conditions under which the fiber practically supports only fundamental mode due to strong attenuation of the higher order modes.