Abstract

In single-mode multifiber connectors, the ferrule endfaces spacing is filled with index matching material and the contact is pushed by the clamp spring. To perform the transfer splicing, the clamp spring must be removed and fitted before and after the transfer action. In this paper, first, the relations among the ferrule pushing force, Young's modulus of the ferrule material, radii of curvature of ferrule endfaces, contact length, etc., are investigated elastomechanically to find the conditions under which the ferrule endfaces-contact remains stable. Next, the fluidity of index matching material and the applied force, together with loss variations are investigated to clarify the mechanisms responsible for loss generation and the situation in which the losses can be kept small. Finally, based on the results of these investigations, the removable clamp spring and fitting mechanism is manufactured. By evaluation of its characteristics, it is shown that satisfactorily good performances are confirmed.

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