An optical fiber alignment mechanism (100) operates to align optical fibers (102). The mechanism can include a key element (120, 130) arranged on the cladding (112) of an optical fiber (102). The key element (120, 130) can engage with a corresponding element of another optical fiber (102) to align the cores (108) of the mating optical fibers. The key element (120) of an optical fiber (102) can also be inserted into a corresponding keyway (226) of a fiber alignment hole (222) of a ferrule (200) such that the optical fiber (102) is oriented properly within the ferrule (200).

Provided is an optical fiber holder comprising a holder body and a cover. The holder body has an accommodation section capable of accommodating a plurality of optical fibers. The holder body or the cover has at least one ridge which can be disposed within the accommodation section. When the cover is closed over the holder body, a plurality of sections which can parallelly accommodate the plurality of optical fibers are parallelly formed by the inner surface of the accommodation section, the lower surface of the cover, and the ridge.

A method for fixing a single-mode fiber to a multimode fiber comprises the following steps: injecting light radiation into the injection end of the single-mode fiber and positioning the junction ends of the single-mode fiber and of the multimode fiber relative to one another so as to propagate at least part of the light radiation in the multimode fiber; modally decomposing the light radiation collected at the injection end of the multimode fiber and measuring a quantity representative of the optical power present in a first group of secondary modes; and adjusting the relative position of the junction ends and freezing them with respect to one another in a determined relative coupling position. Coupling equipment for carrying out the fixing method is also disclosed.

A method for fixing a single-mode fiber to a multimode fiber comprises the following steps: injecting light radiation into the injection end of the single-mode fiber and positioning the junction ends of the single-mode fiber and of the multimode fiber relative to one another so as to propagate at least part of the light radiation in the multimode fiber; modally decomposing the light radiation collected at the injection end of the multimode fiber and measuring a quantity representative of the optical power present in a first group of secondary modes; and adjusting the relative position of the junction ends and freezing them with respect to one another in a determined relative coupling position. Coupling equipment for carrying out the fixing method is also disclosed.

An optical fiber holder for holding an optical fiber includes: a holder main body; and a groove part that is capable of holding a part of the held optical fiber. The optical fiber holder has an adjustment mechanism that is capable of adjusting a position of the groove part with respect to the holder main body in a state where the groove part is placed on the holder main body.

The present invention relates to a fibre optic fusion splicing technique, in particular to a fibre optic fusion splicer for reliable and stable fibre optic fusion splicing, that is characterized by comprising: an alignment part for fixing and aligning first and second optical fibres that are to be fusion spliced; a fusion splicing module having an electrode bar for fusion splicing the first and second optical fibres that are fixed to and aligned in the alignment module; an optical module for photographing the aligned state of the first and second optical fibres aligned by the alignment module, and the fusion-spliced state of the first and second optical fibres fusion-spliced by the fusion splicing module; a support part in which the fusion splicing module and the optical module are mounted; and a lift module for moving the support part up and down.

A theft tracking system for tracking a stolen fusion splicer of fusion splicers each of which is wirelessly accessible. The system includes a registration reception unit to receive registration of identification information of the stolen fusion splicer, a communication unit to transmit an identifier of a wireless access point allocated to the stolen fusion splicer to information communication terminals as a stolen article identifier, an acquisition unit to acquire identifiers of wireless access points around the respective terminals in a predetermined cycle, a determining unit to determine whether there is any identifier matching the stolen article identifier in the identifiers of the acquired wireless access points and to transmit positional information of the information communication terminal together with the stolen article identifier when determined that there is an identifier matching the stolen article identifier, and a notification unit to issue a notification of the transmitted positional information.

Control systems and methods for aligning multimode optical fibers are provided. A method includes producing a brightness profile for a first and second multimode optical fiber. The method further includes determining a cladding center position and a core center position from the brightness profile of the first multimode optical fiber and from the brightness profile of the second multimode optical fiber. The method further includes calculating a concentricity error for the first multimode optical fiber based on the cladding center position and the core center position from the brightness profile of the first multimode optical fiber and for the second multimode optical fiber based on the cladding center position and the core center position from the brightness profile of the second multimode optical fiber. The method further includes aligning the first multimode optical fiber and the second multimode optical fiber based on the concentricity errors of the first multimode optical fiber and second multimode optical fiber.

A fiber array unit (FAU) includes a substrate, a cover element, and a plurality of optical fibers each including a splice joint connecting fibers of different mode-field diameters with a recoating material arranged over at least a portion of the fibers overlapping the substrate, wherein stripped portions of the fibers are arranged in grooves between the substrate and the cover element. A method for fabricating a compact FAU includes splicing ends of stripped sections of first and second optical fiber segments of different mode-field diameters, applying a recoating material over at least portions of the stripped sections, positioning portions of stripped sections of the second optical fiber segments in grooves defined in a substrate, and arranging a cover over the grooves. Certain embodiments include stripping recoating material portions of the second optical fiber segments before they are placed in the grooves.

A fiber optic communications arrangement includes a closure with an interior volume; the closure including at least one cable through-port in communication with the interior volume; and an expansion component attached to an exterior portion of the closure and having an interior region in communication with the closure interior volume. The expansion component includes ruggedized fiber optic adapters mounted thereto. Each of the ruggedized fiber optic adapters includes at least one connector port for receiving ruggedized fiber optic connectors.