Index grating in multimode LiNbO3 monocrystal fiber

摘要

Photorefractive index gratings written by holographic method in commercial single mode silica fiber have been considerably studied. In this paper, we experimentally demonstrate the formation of an index grating in a multimode LiNbO$-3$/ monocrystal fiber written by ordinary holographic method. Experimental techniques and results as well as theoretical analyses are presented.