Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) BARAN J. E.,Adiabatic 2×2 polarization splitter on LiNbO_3,IEEE Photon. Technol. Lett.,,,1992,4,1,39-40,https://cir.nii.ac.jp/crid/1570291226754800640,