Provided is an optical connector that includes a ferrule and an optical fiber as a plastic optical fiber. The ferrule has a leading end face and a through hole for holding a fiber, the through hole having an opening end in the leading end face. The optical fiber has a leading end. The leading end of the optical fiber is inserted in the through hole and located at a retraction position retracted from the leading end face.

An optical system may include an objective lens system having a primary optical axis and a relay lens system having a relay optical axis. The relay optical axis may have a first angular offset with respect to the primary optical axis. The objective lens system may be configured to provide light from a light source to the relay lens system and provide light from the relay lens system to an image sensor. The relay lens system may be configured to provide light from the objective lens system to an end face of an optical fiber, where the end face has a second angular offset with respect to a cross-sectional axis of the optical fiber. The relay lens system may provide light reflected from the end face to the objective lens system.

A multifiber ferrule has a generally forward-facing angled ferrule contact surface that is skewed with respect to the widthwise axis of the ferrule such that the angled ferrule contact surface defines a widthwise skew angle with respect to the widthwise axis. A multifiber optical connector has a connector housing assembly that holds at least one of this type of ferrule. The connector housing assembly can hold two such ferrules so that the ferrule contact surfaces are angled in opposite widthwise directions and so that a broad side of the first ferrule opposes a broad side of the second ferrule in parallel, spaced apart relationship therewith. A polarity-changeable multifiber optical connector is also provided that includes a multifiber ferrule with a generally forward-facing ferrule contact surface at an oblique angle to the longitudinal axis.

There is provided an adapter tip to be employed with an optical-fiber connector endface inspection microscope and an optical-fiber connector endface inspection microscope system suitable for imaging the optical-fiber endface of an angled-polished optical-fiber connector deeply recessed within a connector adapter. The adapter tip or microscope system comprises a relay optical system comprising a Rhomboid prism. The Rhomboid prism being disposed so as to receive light reflected from said optical-fiber endface during inspection and laterally shift the light beam reflected from the angled-polished optical-fiber endface.

The present disclosure describes embodiments of a connector and an optical module, pertaining to the technical field of optoelectronic devices. The connector includes a substrate provided with a through-hole passing through the substrate from a first board surface to a second board surface thereof. The second board surface faces opposite from the first board surface. The first board surface is provided with a first groove and a second groove, and the first groove and the second groove respectively are configured to adapt to different optical fiber splices.

An optical connection component includes a plurality of optical fibers and a capillary. Each of the optical fibers includes a glass fiber and a resin coating covering the glass fiber. Each of the optical fibers is provided with a coated portion where the glass fiber is covered with the resin coating, and a coating removed portion where the glass fiber is exposed from the resin coating. The coating removed portion is located closer to an end face of the optical fiber than the coated portion. The glass fiber has an outer diameter of less than 124 μm. The capillary has a first end face and a second end face opposing to each other, and a plurality of holes having an opening at the first end face and extending towards the second end face. The holes respectively receive the coating removed portions of the optical fibers.

Methods for cleaving an optical fiber that extends from a ferrule are provided herein. The ferrule can be aligned on a first side of a scribe wire and an unconstrained end of the optical fiber on a second side of the scribe wire. Tension can be applied to the scribe wire with the optical fiber. Relative motion between the scribe wire and the optical fiber can be caused, while the tension is applied with the optical fiber. The scribe wire and the optical fiber can be separated. A fiber optic shard can be cleaved from the optical fiber. The fiber optic shard may include the unconstrained end of the optical fiber.

A fiber optic connector housing has seating features in an internal opening that coordinate with a flange on a fiber optic ferrule to have a secure and precise position for the fiber optic ferrule. There are at least one pair of ramps that may be attached to an inner connector housing wall and an opening wall. The flange has contacts that engage the ramps, which direct the fiber optic ferrule in a rotational direction as well as a translational direction to a final position. The seating features also ensure the correct position after the fiber optic ferrule has been mated and unmated.

A fiber coupling assembly for interfacing solid core and a hollow core optical fibers includes first and second fiber optic ferrules each having a bore between proximal and distal end faces thereof. At least one ferrule end face is non-perpendicular to longitudinal axes of the ferrules. A bore of one ferrule contains a hollow core optical fiber, and a bore of the other optic ferrule contains a solid core optical fiber with a mode field diameter (MFD) transition region, to bridge a MFD mismatch between the fibers. An air gap may be provided between at least portions of ferrules at an inter-ferrule region. A fiber optic ferrule includes a bore that is non-parallel with a longitudinal axis of the ferrule, and at least one end face that is non-perpendicular to the longitudinal axis, with an optical fiber in the bore optionally including a MFD transition region.

An optical receptacle includes a fiber stub having an optical fiber with a core and cladding, a ferrule with a through-hole fixing the optical fiber, and a bonding agent fixing the optical fiber in the ferrule, and a holder holding the fiber stub. The optical fiber is disposed inside the through-hole over an entire region of the optical fiber, and includes a portion in which a core diameter and a fiber outer diameter decrease gradually toward an end surface of the ferrule on a side opposite to a side to be optically connected to a plug ferrule. The bonding agent is filled into a space between the optical fiber and an inner wall of the through-hole.