A plug of a connector that performs optical transmission is provided with an optical connection unit. The optical connection unit includes a lens that is provided on a side surface of the optical connection unit and performs optical connection with a lens provided on an optical connection unit of a receptacle in a direction orthogonal to an inserting/removing direction of the plug, and a locating surface that is provided on the side surface of the optical connection unit and abuts on a locating surface of the receptacle to determine a position of the optical connection unit in a mating condition of the plug into the receptacle.

There are provided an optical fiber display system and an optical fiber changeover method each enabling an efficient optical fiber changeover work. The optical fiber display system according to the present invention includes a plurality of core wire identification terminals 101. Each of the core wire identification terminals 101 includes: bent part formation units 11 configured to form a bent part at an optional position of an optical fiber 50 and to leak optical signals propagating through the optical fiber 50 from the bent part; analysis units 12 configured to acquire identification numbers of communication apparatuses (51 and 52) included in the leaked optical signals, the communication apparatuses (51 and 52) being connected to respective ends of the optical fiber 50; a communication unit 13 configured to inquire of a database 201 storing relationship between the optical fiber and the communication apparatuses about the acquired identification numbers of the communication apparatuses, and to receive an identification number of the optical fiber 50 corresponding to the acquired identification numbers of the communication apparatuses, from the database 201; and a display unit 14 configured to display the acquired identification numbers of the communication.

To reduce bad connections of a BGA optical module as an optical fiber interface during mounting by reflowing. An optical module includes: a substrate to which an optical fiber is connected and fixed and on which an electronic circuit, an optical circuit or the like is formed; a ball grid array provided on one face of the substrate as an electrical interface used when the optical module is mounted on a mounting substrate; a lid having a thermal conductivity provided on another face of the substrate; and a fiber routing mechanism provided in contact with the lid, the fiber routing mechanism having a thermal conductivity and shaped to enable the optical fiber to be wound around the fiber routing mechanism.

The photoelectric signal conversion and transmission device includes a photoelectric signal module and a fiber joint, matched and coupled together. A circuit board of the photoelectric signal module includes one or more connection bases. Light emission elements, light reception elements, and amplifiers are configured on a first coupling face of the connection based, and electrically connected by first and second wires. The fiber joint includes a number of fibers axially aligned with the light emission and reception elements. By having the light emission and reception elements and amplifiers configured on a same coupling face, their physical connection distance is reduced, thereby decreasing signal attenuation, enhancing signal transmission performance, and facilitating structural miniaturization.

The invention relates to a positioning apparatus (100) for positioning a light-guiding fiber (206) in a calibration port (208) of a medical apparatus (202) comprising at least one light source (204) for the light-guiding fiber (206), wherein the positioning apparatus (100) comprises an elongate body (102) with two end faces (110, 112) and at least one side face (116). A channel (104) for receiving the light-guiding fiber (206) is formed in the body (102), said channel extending along a longitudinal axis of the body (102) proceeding from a first end face (110). Here, according to the invention, provision is made for the body (102), at least in one portion, to consist of an opaque material in the region of the channel (104) and/or to be coated with an opaque material and for said body to have at least one cutout (113, 118), which extends from a side face (116) and/or the second end face (112) of the body (102) to the channel (104) such that radiation emitted by the light-guiding fiber (206) can only emerge from the positioning apparatus (100) in unimpeded fashion through the at least one cutout (113, 118).

The present disclosure describes active optical cable assemblies. A cable assembly includes a fixed active optical connector having a transceiver, a ruggedized optical fiber cable integrated with the fixed active optical connector, a main cable assembly comprising one or more optical fiber cables, wherein the ruggedized cable is spliced to the main cable assembly; and a removable shroud configured to surround at least a portion of the fixed active optical connector plugged into a remote radio unit and to be secured to a remote radio unit. Active optical cable and remote radio unit systems are also described.

A remote indicator system comprising a housing and a display unit located remotely from the housing. The housing comprises a first light source and a first end of an end-emitting fibre optic cable. The display unit comprises a second end of the fibre optic cable. The housing includes manual switching means configurable to allow light from the first light source to pass into the first end of the optical fibre cable and further configurable to prevent light from the first light source from passing into the first end of the optical fibre cable.

A connection structure of optical waveguide chips includes a base substrate (2003) in which grooves (2013) are formed, spacer optical fibers (2006) each disposed for a corresponding one of the grooves (2013) and fitted in the groove (2013) while partially projecting from the base substrate (2003), and silica-based PLCs (2001, 2002) that are a plurality of optical waveguide chips in each of which grooves (2007) fitted on the projecting portions of the spacer optical fibers (2006) are formed at positions of an optical waveguide layer (2008) facing the grooves (2013), and each of which is mounted on the base substrate (2003) while being supported by the spacer optical fibers (2006). The silica-based PLCs (2001, 2002) are mounted on the base substrate (2003) such that incident/exit end faces of the optical waveguide layers (2008) face each other.

The photoelectric signal conversion and transmission device includes a photoelectric signal module and a fiber joint, matched and coupled together. A circuit board of the photoelectric signal module includes one or more connection bases. Light emission elements, light reception elements, and amplifiers are configured on a first coupling face of the connection based, and electrically connected by first and second wires. The fiber joint includes a number of fibers axially aligned with the light emission and reception elements. By having the light emission and reception elements and amplifiers configured on a same coupling face, their physical connection distance is reduced, thereby decreasing signal attenuation, enhancing signal transmission performance, and facilitating structural miniaturization.

The present disclosure describes active optical cable assemblies. A cable assembly includes a fixed active optical connector having a transceiver, a ruggedized optical fiber cable integrated with the fixed active optical connector, a main cable assembly comprising one or more optical fiber cables, wherein the ruggedized cable is spliced to the main cable assembly; and a removable shroud configured to surround at least a portion of the fixed active optical connector plugged into a remote radio unit and to be secured to a remote radio unit. Active optical cable and remote radio unit systems and kits are also described.