Abstract: Energy harvesting system for harvesting electric energy from a power cable including a power cable having at least one core that includes in a radial direction: an electric conductor; an insulation system surrounding the electric conductor comprising at least an insulating layer; a ground shield surrounding the insulation system; and at least one insulated metallic electrode positioned between the electric conductor and the ground shield. At least a part of an outer surface of the at least one insulated metallic electrode is not in direct contact with the ground shield. The at least one insulated metallic electrode is spaced from the electric conductor.

Abstract: A multimode optical fiber for continuous transmission of electromagnetic radiation at high power, wherein the fiber defines a fiber axis and includes a core and a cladding surrounding the core, and wherein the multimode optical fiber is a multimode graded-index fiber, the refraction index profile in the fiber essentially following formula (1): n ? ( r ) = { n 1 ? [ 1 - 2 ? ( r a ) g ? ? ] 1 ? / ? 2 , r < a n 2 , r > a ( 1 ) ? = n 1 2 - n 2 2 2 ? n 1 2 ( A ) NA = n 1 2 - n 2 2 ( B ) where ? is formula (A), r is the distance from the fiber axis, n(r) is the nominal refractive index as a function of distance from the fiber axis, n1 is the nominal refractive index on the axis of the fiber, n2 is the refractive index of the cladding, a is the core radius, and g is a parameter that defines the shape of the profile, where the core diameter 2a is between 90 UM and 190 ?M, the parameter g is between 1.

Abstract: A multimode optical fiber for continuous transmission of electromagnetic radiation at high power, wherein the fiber defines a fiber axis and includes a core and a cladding surrounding the core, and wherein the multimode optical fiber is a multimode graded-index fiber, the refraction index profile in the fiber essentially following formula (1): n ? ( r ) = { n 1 ? [ 1 - 2 ? ( r a ) g ? ? ] 1 ? / ? 2 , r < a n 2 , r > a ( 1 ) ? = n 1 2 - n 2 2 2 ? n 1 2 ( A ) NA = n 1 2 - n 2 2 ( B ) where ? is formula (A), r is the distance from the fiber axis, n(r) is the nominal refractive index as a function of distance from the fiber axis, n1 is the nominal refractive index on the axis of the fiber, n2 is the refractive index of the cladding, a is the core radius, and g is a parameter that defines the shape of the profile, where the core diameter 2a is between 90 UM and 190 ?M, the parameter g is between 1.

Abstract: A converter device that changes the wavelength of optical signals originated by an OTDR to supervise optical networks, in a manner that eliminates the traffic signal interference in the supervision signal, is provided. A method for increasing the OTDR supervision distance range, wherein the converters are placed at route points where the optical signal from the OTDR reaches its useful attenuation limit and needs to be recovered, reducing the number of OTDRs utilized in the supervision system, is also provided.

Abstract: 1—“A DOUBLE PASS OPTICAL AMPLIFIER WITH UNIDIRECTIONAL COMPENSATION OF CHROMATIC DISPERSION AND OBSTRUCTION OF BACKSCATTERING”, composed by an EDFA, whose input/output stage is integrated by a circulator (6), and the amplification stage is composed by a pump laser (1) and an Erbium-doped fiber connected to a multiplexer (3), said amplifier, in which the optical signal undergoes an initial amplification while passing through the Erbium-doped fiber on the way through the fiber and a second amplification on the way back of the same fiber, presents, after the amplification stage, at least one dispersion compensating fiber (11), whose input and output are connected to the free extremity of the Erbium-doped fiber (2), through at least one device (12) arranged in the circuit in order to prevent the backscattering generated in the dispersion compensating fiber (11) from returning to the Erbium-doped fiber (2) and to allow the signal to travel through the dispersion compensating fiber (11) only once and in one directi

Abstract: “A DOUBLE PASS OPTICAL AMPLIFIER WITH UNIDIRECTIONAL COMPENSATION OF CHROMATIC DISPERSION AND OBSTRUCTION OF BACKSCATTERING”, composed by an EDFA, whose input/output stage is integrated by a circulator (6), and the amplification stage is composed by a pump laser (1) and an Erbium-doped fiber connected to a multiplexer (3), said amplifier, in which the optical signal undergoes an initial amplification while passing through the Erbium-doped fiber on the way through the fiber and a second amplification on the way back of the same fiber, presents, after the amplification stage, at least one dispersion compensating fiber (11), whose input and output are connected to the free extremity of the Erbium-doped fiber (2), through at least one device (12) arranged in the circuit in order to prevent the backscattering generated in the dispersion compensating fiber (11) from returning to the Erbium-doped fiber (2) and to allow the signal to travel through the dispersion compensating fiber (11) only once and in o