Multi-core fiber connector using V-groove ferrule

•We propose a novel connector for a multi-core fiber that employs a V-groove ferrule.•The connector achieves rotational alignment by V-groove ferrule/pin split sleeve.•The floating structure can remain unchanged by currently available connector parts.•More stable connection can be realized by considering tolerance of V-groove and pin.

We propose a novel connector for a multi-core fiber (MCF) that employs a V-groove ferrule. The proposed connector achieves rotational angle alignment by the insertion of a V-groove ferrule into a split sleeve with a pin. The proposed mechanism enables us to align cores directly in MCF not only in the vertical, horizontal and longitudinal directions but also in the rotational direction. With the proposed technique there is no need to control the clearance of the connector components because the rotational axis of the plug is directly aligned with the adaptor when we fit the pin into the V-groove. Moreover, the floating structure can remain unchanged since currently available connector parts can be employed. We show that this technique can precisely align the rotational angle for MCF with an arbitrary core structure. We also show that a more stable connection can be realized if we take account of the tolerance of the V-groove and pin.