光ファイバの端面研磨と加工変質層 : 加工変質層と反射減衰量の関係

概要

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To achieve high quality machined edge plane of optical communication devices, we study the relation between subsurface damage of machined optical fiber edge plane and the return loss which is important characteristics for optical communication. An uniform subsurface damaged layer whose optical index was different from original (1.45) was assumed. The return loss calculated from the uniform layer model had good correlation with measured return loss of the edge plane machined with free fine diamond abrasive grinding. The layer optical index and thickness were measured with ellipsometer. The layer machined with diamond abrasive was measured to have rather large index of 1.53 〜 1.55,which were derived from the density increase with residual strain by plastic deformation of surface material. The thickness of the layers decreased with the decrease of diamond abrasive diameter. With 0.1-μm-diamter diamond, the edge plane which had thin damaged layer indicated good return loss of 55 dB.
公益社団法人精密工学会の論文
1998-10-05