张立岩, 胡勇, 严长峰, et al. Fusion splicing and splicing loss measurement of G.657 optical fibre[J]. 2014, 27(11): 34-36. DOI: 10.13992/j.cnki.tetas.2014.11.008.
there are problems and misunderstandings on fusion splicing and splicing loss measurement. This paper has mainly explain the "Dark line"&"Halo" phenomenon and OTDR apparent "Gain" and "Loss" during splicing loss measurement
and give advices to fusion splicing mode selection.