A study on insertion-loss improvement for optical connector usingthe analysis of transmitted optical intensity

摘要

In the butt-joint coupling using cylindrical ferrules and sleeve,the insertion loss of the single-mode optical connector depends on theaccuracies of components (i.e., sleeve, ferrule, fiber etc.). And it isdifficult to achieve both cost reduction and performance improvementsimultaneously in optical connectors because higher accuracies givebetter performance but cause higher cost. For single-mode fiberconnection, the dimensional accuracies of currently available ferrulesand optical fibers are not sufficiently high to ensure a low insertionloss with reasonable cost. And many efforts have been made to have lowinsertion loss without any higher order of accuracies of components. Inone of the proposed methods the technique of stepwise orientation offerrule is used to reduce the transverse offset between butt-joint fibercores by achieving Minimizing Loss Region (MLR). This method requiresseveral stepwise rotations to make the fiber core be within the MLR thatwas determined by optimal trade-off between insertion loss and workingtime. In this method the insertion loss depends on the size of thepre-determined MLR. In the report a new assembling method through whicha very small MLR can be achieved in a short time is proposed