Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Fujimoto Takafumi and Tanaka Sho,Study of Non-Diffraction Beam for Free Space Optical Communication,ITE Technical Report,13426893,The Institute of Image Information and Television Engineers,2010,34.3,0,61-64,https://cir.nii.ac.jp/crid/1390282679503136128,https://doi.org/10.11485/itetr.34.3.0_61