A hybrid optical and electrical connection system includes a connectorized pigtail and a closure. The connectorized pigtail includes: a) a stub cable including a jacket containing at least one optical fiber and at least two electrical conductors, the stub cable having opposite first and second ends; and b) a hybrid optical and electrical connector that is factory terminated at the first end of the stub cable. The closure mounts at the second end of the stub cable for enclosing optical and electrical connections between the second end of the stub cable and a field cable.

An optical transmission module includes a light emitting device for transmitting a first optical signal, a light receiving device for receiving a second optical signal, an optical fiber for guiding a third optical signal in which the first optical signal and the second optical signal are coupled, and an optical waveguide substrate having an optical waveguide made of first resin, wherein a groove formed on the optical waveguide substrate is provided with a prism having the optical fiber and a reflective face through which the first optical signal transmit, a first side face of the prism contacts a first wall face of the groove, and a second side face thereof contacts a second wall face of the groove.

An optical transmission module includes a light emitting device for transmitting a first optical signal, a light receiving device for receiving a second optical signal, an optical fiber for guiding a third optical signal in which the first optical signal and the second optical signal are coupled, and an optical waveguide substrate having an optical waveguide made of first resin, wherein a groove formed on the optical waveguide substrate is provided with a prism having the optical fiber and a reflective face through which the first optical signal transmit, a first side face of the prism contacts a first wall face of the groove, and a second side face thereof contacts a second wall face of the groove.

An optical transmission module is configured such that: a first optical device is provided on an upper surface of an optical waveguide substrate; a second optical device is provided on a lower surface of the optical waveguide substrate; a V-groove is formed on an end face of the optical waveguide substrate, the V-groove including a first reflective face and a second reflective face as wall faces; the first optical device is optically coupled with an optical waveguide via the first reflective face; and the second optical device is optically coupled with the optical waveguide via the second reflective face.

To effectively prevent the acceleration of the drift phenomenon generated by the application of a high electric field to a substrate through a bias electrode in a waveguide type optical element. A waveguide type optical element includes a substrate (100) having an electro-optic effect, two optical waveguides (104 and 106) disposed on a surface of the substrate, a non-conductive layer (120) which is disposed on the substrate and is made of a material having a lower dielectric constant than the substrate, and a control electrode (150) which is disposed on the non-conductive layer and is intended to generate a refractive index difference between the two optical waveguides by respectively applying electric fields to the two optical waveguides, and the non-conductive layer is constituted of a material which includes silicon oxide, an oxide of indium, and an oxide of titanium and has a ratio between a molar concentration of the titanium oxide and a molar concentration of indium oxide of 1.2 or more, and a voltage generating an electric field of 1 V/μm or more in the substrate is applied to the control electrode.

The present invention relates to a fiber optic sensor, a method of manufacturing the same, and a vibroscope using the same. A fiber optic sensor according to an embodiment of the present invention includes: an optical cable; an optical fiber taken out of the optical cable and provided with a fiber Bragg grating (FBG); a mold housing as a case into or to which the optical cable and the optical fiber are partially inserted and fixed, the mold housing including an optical cable accommodation groove to accommodate the optical cable, an optical fiber accommodation hole extending from the optical cable accommodation groove to accommodate the optical fiber, and a coating agent introduction hole communicated with the optical fiber accommodation hole so as to allow fluid to flow therebetween from an outer side of the mold housing so that a liquid-type coating agent permeates via the optical fiber accommodation hole; and a coating layer filling the optical fiber accommodation hole and the coating agent introduction hole and formed on an outer circumference of the optical fiber including the FBG and a surface of the mold housing.

A plug mounted on an optical cable with one or more optical contacts each one having a tab which is deformable elastically or mounted so as to pivot relative to the rest of the contact, including: a body including a front part and a rear part; a bushing fitted around the front part with axial sliding forward, the bushing bearing a tab with an appendage extending inside the rear part, the tab of the bushing and the tab of each contact being disposed relative to each other so that when a traction force is applied to make the bushing slide around the front part, the appendage is able to bear against the tab of each contact so as to deform it elastically or make it pivot until the disconnection is produced between the contact and the converter.

The present invention concerns a plug intended to be mounted on at least one cable whose one end supports one or more contacts comprising: a body, comprising: a front portion extending along a longitudinal axis, the front portion being designed to be lodged in a socket, the front portion being adapted to lodge and hold the contact(s) or at least an optoelectronic converter connected to the contact(s); a rear portion forming a sheath, designed to lodge the end of the cable, itself supporting the contact(s); the rear portion being mounted floating about the front portion; a plurality of flexible tabs made of electrically conductive material, distributed on the outer periphery of the front portion, the flexible tabs being adapted to remain in mechanical contact with the interior of the socket when the front portion is lodged in the latter.

A method and apparatus for automatic determination of a fiber type of at least one optical fiber span used in a link of an optical network, the method comprising the steps of measuring a length of said optical fiber span; measuring a chromatic dispersion of said optical fiber span; determining a fiber dispersion profile of said optical fiber span on the basis of the measured length and the measured fiber chromatic dispersion; and determining a fiber category and/or a specific fiber type of said optical fiber span depending on the determined fiber dispersion profile.

An optical connection includes a plurality of ferrules, an optical contact to allow transfer of light, a mechanical contact to allow torque transfer from the optical connection, and a rotational self-alignment structure to allow optical fibers of different optical connectors to self-rotate into rotational self-alignment upon action of connecting, wherein the ferrules are aligned and engage the torque transfer. The rotational self-alignment structure can be a tooth configuration, a helical thread configuration, a ferrule guide configuration, a spring sleeve configuration, derivatives thereof and combinations therefrom.