かしめによる光通信モジュール用光学レンズ実装技術の開発

概要

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The plastic deformation tnethod has been investigated for mounting an optical rod lens which is used to introduce the light from the semiconductor laser into the optical fiber. In this method the cylindrical rod lens of 2mm in diameter and 2.1 mm in length was fixed by using the plastic deformation of a metal pipe. First the stress in the fixing process was evaluated experimentally and numerically. It is found that the gap between the lens and the pipe had to be small enough and that the. pipe had to be pressed with the optimal load in order to fix the lens without any breakage. The tension stress of 3MPa is loaded on the lens surface. This value is much smaller than that of the breakage stress of the lens. Next the airtight fixing was evaluated experimentally. It is found that the airtight fixing is accomplished by thickening the metal film on the lens and annealing the pipe. The fixing strength was kept after the heat cycle test. From these results this method is found to be quite effective for mounting the optical lens in optical communication modules.
公益社団法人精密工学会の論文
1999-05-05