An optical fiber guide structure includes a guide member that is configured to be erected on a connection end surface of an optical waveguide device and forms a space for accommodating a leading end portion of an optical fiber to be connected to the optical waveguide device. The guide member is formed of an elastically deformable material, and in a specific region a longitudinal direction of the guide member, and a diameter of an inscribed circle in contact with an inner wall of the guide member in a plane perpendicular to the longitudinal direction is smaller than an outer diameter of the optical fiber.

An optical fiber connection structure according to the present invention includes a fiber support member configured to support an optical fiber to be optically connected to an optical waveguide device, a stopper configured to restrict movement in an axial direction of the optical fiber supported by the fiber support member, and a lens disposed on an optical axis between an end surface of the optical waveguide device and the optical fiber.

A monolithic fiber-lens array includes a number of optical fibers integrated into a fiber block and multiple lens elements integrated into a lens block. The fiber block is coupled to the lens block via a transparent adhesive layer, and the tips of the optical fibers are aligned with respective focal points of the lens elements.

A composite connector for optical power meter is provided, which includes a fixation base and an active connection base. The fixation base is installed on an optical power meter; the fixation base includes a left hole, a right hole and a central hole. The active connection base includes a bottom plate, an active pin, a first fiber socket and a second fiber socket. The first fiber socket and the second fiber socket are disposed on the bottom plate. The active pin penetrates through the bottom plate and is inserted into the left hole, whereby a first circle, whose center is at the active pin and circumference passes through the first fiber socket as well as the second fiber socket, overlaps a second circle, whose center is at the left hole and circumference passes through the central hole, in the normal direction of the active connection base.

An optical-fiber-attached ferrule includes: an optical fiber hole into which an optical fiber is inserted and fixed with a first adhesive; and an adhesive-filling section including an opening surface and an opposed surface opposite the opening surface. The adhesive-filling section is filled with a second adhesive that is softer than the first adhesive with an end surface of the optical fiber positioned closer to the opposed surface than to the opening surface.

A method of manufacturing an optical fiber assembly into which optical fibers are integrated includes: preparing an alignment member having through holes with a pitch that is greater than a coating diameter of the optical fibers; inserting each of the optical fibers into one of the through holes; after the inserting of the optical fibers into the through holes, holding the optical fibers on both sides of the alignment member by a pair of grippers; after the inserting of the optical fibers into the through holes, connecting at least adjacent ones of the optical fibers by disposing an adhesive material on at least one side of the alignment member; and forming an optical fiber assembly by curing the adhesive material in a state in which the optical fibers held by the grippers are stretched along an optical axis.

An optical sensor system comprising: (a) a light source for at least one optical sensor, the light source comprising at least, (i) an interposer having first and second opposing sides and defining at least one alignment aperture extending from the first opposing side to the second opposing side; (ii) at least one fiber disposed in the at least one alignment aperture, the at least one fiber having a first optical axis; (iii) at least one light emitting component mounted to the second opposing side and having a second optical axis coincident with the first optical axis, the light emitting component configured to emit light, at least a portion of which is coupled with the at least one fiber as coupled light; and (b) the at least one optical sensor optically coupled to the at least one fiber.

A butt closure base includes a base housing defining a plurality of cavities. A first gel is disposed in each of the plurality of cavities. The butt closure base further includes a plurality of wedge assemblies, each of the plurality of wedge assemblies removably insertable into one of the plurality of cavities. Each of the plurality of wedge assemblies includes an outer cover, and a second gel. The butt closure base further includes a plurality of cable entry passages, each of the plurality of cable entry passages defined between one of the plurality of cavities and one of the plurality of wedge assemblies. The butt closure base further includes a plurality of bushings, each of the plurality of bushings disposed in one of the plurality of cable entry passages.

A method for manufacturing an array of optical fiber ferrules includes producing on a first side of a wafer a pattern of an array of disks or holes (111, 112) in a metallic coating (121, 122). The metallic coating is covered with a negative photoresist layer. A second side of the wafer opposite to the first side is illuminated with light that propagates as a divergent or collimated beam through the photoresist layer, thereby creating a conical pattern within the photoresist layer. The photoresist layer is developed to create conical apertures. A sheet with a conical openings pattern registered to the conical apertures is attached so that a small diameter of each conical opening of the sheet is smaller than, and in contact with, a large diameter of the conical aperture to which it is registered, thereby forming an array of optical fiber ferrules.

A monolithic fiber-lens array includes a number of optical fibers integrated into a fiber block and multiple lens elements integrated into a lens block. The fiber block is coupled to the lens block via a transparent adhesive layer, and the tips of the optical fibers are aligned with respective focal points of the lens elements.