Abstract: An optical connector for connecting optical fibers, comprises: a guide-groove substrate having grooves for positioning optical fibers and guide pins; an upper plate having groove portions each for covering the guide pins positioned in the guide grooves of the guide-groove substrate; elastic guide-pin pressing members each provided in the groove portions of the upper plate above portions where the guide pin grooves are in contact with the guide pins. In such a arrangement, it is preferable to forman oxide film on said V-grooves of the guide-groove substrate at least in the vicinity of contact points between the guide pins and the V-grooves. The optical connector further includes a resin molding portion for surrounding the substrate and the upper plate, the resin molding portion including a pair of opposite opened portions at top and bottom surfaces thereof.

Abstract: An optical connector for connecting optical fibers, comprises: a guide-groove substrate having grooves for positioning optical fibers and guide pins; an upper plate having groove portions each for covering the guide pins positioned in the guide grooves of the guide-groove substrate; elastic guide-pin pressing members each provided in the groove portions of the upper plate above portions where the guide pin grooves are in contact with the guide pins. In such a arrangement, it is preferable to form an oxide film on said V-grooves of the guide-groove substrate at least in the vicinity of contact points between the guide pins and the V-grooves. The optical connector further includes a resin molding portion for surrounding the substrate and the upper plate, the resin molding portion including a pair of opposite opened portions at a front and back surfaces thereof.

Abstract: A redundant length treatment mechanism for an optical fiber which is stored in an optical cable and has one end connected to an optical connector, includes a storage case in which a redundant part of the optical fiber exposed from the optical cable is stored while wound up in a loop form, a bent form or an S-shape form, the storage case having a draw-out portion through which one end portion of the looped optical fiber is drawn out, and curvature restricting means comprising a pair of stoppers secured to the optical fiber for restricting radius of curvature of the optical fiber stored in a loop form in the storage case.

Abstract: A multicore optical connector includes a connector body having a pair of alignment pin holes and a plurality of optical fiber holes formed therebetween and optical fibers inserted in the optical fiber holes such that the end faces of the optical fibers are exposed through the optical fiber holes. In the multicore optical connector, the optical fiber holes are divided into optical fiber hole groups of a number which coincides with the number of the groups of the optical fibers, and the optical fiber hole groups are separated from one another.