Patent application number | Description | Published |
20090205374 | Method and Apparatus for the Production of Optical Fibers With Reduced Polarization Mode Dispersion - A method and apparatus for manufacturing an optical fiber includes the steps and/or means of: drawing a fiber from a heated preform by applying a pulling force to the fiber; spinning the fiber while it is drawn, wherein the step of spinning the fiber includes the sub-steps of winding the fiber on a spin roller by a winding arc, such that a friction force is generated between the fiber and the spin roller resulting from the winding arc and from the pulling force; axially displacing the spin roller such that the fiber is caused to roll over the spin roller surface by the friction force. | 08-20-2009 |
20090274424 | Buffered optical fibre and method for improving the lifetime thereof - A buffered optical fibre includes an optical waveguide, at least one exterior coating surrounding the optical waveguide and a buffer coating surrounding the at least one exterior coating, wherein the buffer coating is a tight buffer coating made of a material having a density of at least about 1.2 Kg/dm | 11-05-2009 |
20100092182 | METHOD AND SYSTEM FOR FIBER-OPTIC MONITORING OF SPATIALLY DISTRIBUTED COMPONENTS - A system for monitoring ancillary elements of an electric power distribution network, includes an optical fiber path associated with the ancillary elements to be monitored, respective optical branches branching from the optical fiber path, wherein each optical branch includes at least one passive optical attenuator operatively coupled to, and having an attenuation adapted to change in response to a change in operating conditions of the respective ancillary element, and an optical reflector; an optical radiation source adapted to inject optical radiation into the optical fiber path; and an optical receiver adapted to detect back-reflected optical radiation reflected by the optical reflector; the monitoring system being further adapted to recognize a position of at least one of the ancillary elements based on a characteristic of the back-reflected optical radiation. | 04-15-2010 |
20100232754 | Method of making a low PMD optical fiber - A method of making an optical fiber includes the steps of: providing an optical fiber preform; heating an end portion of the optical fiber preform so as to obtain a softened preform end portion; drawing the softened preform end portion to form the optical fiber; applying to the optical fiber a substantially sinusoidal spin having a spin amplitude and a spin period, the substantially sinusoidal spin being transmitted to the softened preform end portion, and determining an actual spin amplitude applied to the fiber, wherein the actual spin amplitude is the spin amplitude applied in correspondence to the softened preform end portion. The spin amplitude and spin period of the substantially sinusoidal spin are selected in such a way that a ratio of the actual spin amplitude to the spin period is in the range of approximately 0.8 to approximately 1.4 turns/m | 09-16-2010 |
20120082422 | ELECTRIC CABLE WITH STRAIN SENSOR AND MONITORING SYSTEM AND METHOD FOR DETECTING STRAIN IN AT LEAST ONE ELECTRIC CABLE - An electric cable includes a strain sensor longitudinally extending along the cable and including a strain optical fibre arranged within a bending neutral region surrounding and including a bending neutral longitudinal axis of the electric cable, and at least two longitudinal structural elements, at least one of the at least two longitudinal structural elements being a core including an electrical conductor, wherein the strain sensor is embedded in a strain-transferring filler mechanically coupling at least one of the at least two longitudinal structural elements with the strain sensor. With the disclosed cable construction, the strain experienced by the at least one of the at least two longitudinal structural elements is transferred to the strain sensor at least in a strained condition. In the preferred embodiments, the electric cable is a heavy-duty cable. | 04-05-2012 |
20120174683 | ELECTRIC CABLE WITH BENDING SENSOR AND MONITORING SYSTEM AND METHOD FOR DETECTING BENDING IN AT LEAST ONE ELECTRIC CABLE - A method for monitoring at least the bending strain of at least one electric cable provided with at least one peripheral mechanically non-symmetric strength member is provided. | 07-12-2012 |
20120182130 | MONITORING METHOD AND SYSTEM FOR DETECTING THE TORSION ALONG A CABLE PROVIDED WITH IDENTIFICATION TAGS - A method for monitoring the torsion of a cable includes the steps of: providing a cable having an outer surface and extending along a longitudinal direction, the cable being provided with at least one identification tag, preferably an RFID tag, arranged in a tag angular position in a cross-sectional plane taken transverse to the longitudinal direction, the at least one tag storing a tag identification code and being capable of transmitting a tag electromagnetic signal; interrogating the at least one identification tag to receive the tag electromagnetic signal, and detecting the tag electromagnetic signal, wherein the step of detecting the tag electromagnetic signal includes the step of reading the tag identification code and determining the tag angular position of the at least one identification tag. A torsion monitoring system of a cable includes at least one identification tag. | 07-19-2012 |
20140049786 | METHOD FOR MEASURING THE LENGTH OF AN ELECTRIC CABLE THAT USES AN OPTICAL FIBRE ELEMENT AS A SENSOR - A method of measuring the length of an electric cable, includes providing an electric cable having a cable length and including a cable neutral axis, and a fibre unit longitudinally extending along the cable and including an optical fibre arranged substantially along the neutral axis, wherein the optical fibre is mechanically coupled with the cable; injecting an optical signal into the optical fibre; detecting back-scattered light from the optical fibre responsive to the injected optical signal; analysing the detected back-scattered light as a function of time so as to determine the length of the optical fibre, and deriving the cable length from the length of the optical fibre. | 02-20-2014 |
20140124232 | ELECTRIC CABLES FOR SOLAR PLANTS GENERATING ELECTRICAL AND THERMAL ENERGY, AND PLANTS COMPRISING THE ELECTRICAL CABLES - A composite flat cable, having in cross-section a major side, may include an outer sheath; two main electrical conductors; and two ducts for fluid circulation configured to circulate fluid. A composite flat cable may include two ducts configured to circulate fluid; a first main electrical conductor on a first side of the two ducts; a second main electrical conductor on a second side of the two ducts; and a sheath around the two ducts, the first main electrical conductor, and second main electrical conductor. A solar cogeneration plant may include at least one cell configured to produce electric current, connected to a plant for distribution of electrical energy and of heated fluid by a composite flat cable. | 05-08-2014 |