Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Sumida Shin and Rumi Ito and Kazuyoku Tei and Jun Enokidani and Tsutomu Sakurai,Polarization-maintaining amplifier based on 3C fiber structures,SPIE Proceedings,0277-786X,SPIE,2015-03-04,9344,,934420,https://cir.nii.ac.jp/crid/1872835442637697664,https://doi.org/10.1117/12.2078489