An optical power supply system includes a power sourcing equipment, a powered device and a control device. The power sourcing equipment includes a semiconductor laser that oscillates with electric power and performs pulsed output of feed light. The powered device includes a photoelectric conversion element that converts the feed light into electric power. The control device adjusts a supply amount of the feed light to be supplied from the semiconductor laser by a pulse width of the feed light according to a consumption of the electric power obtained by the conversion by the powered device.

Embodiments include an optical fiber cable comprising a length extending between a first end and a second end, a central cooling tube, a plurality of optical fibers disposed radially around the cooling tube, each optical fiber comprising a fiber core and a cladding disposed around the fiber core, an outer protective cover, and an inner thermal filler disposed between the outer protective cover and the central cooling tube and surrounding each of the optical fibers, wherein each of the central cooling tube, the outer protective cover, the inner thermal filler, and the plurality of optical fibers extend the length of the cable. Various systems and methods for removing imperfections from individual optical fibers and for distributing power across long distances using the optical fiber cable are also provided.

The invention relates to a power-over-fiber (PoF) system, comprising: an optical source configured to generate an optical signal, wherein the optical signal comprises an intensity modulation; an optical fiber configured to receive the optical signal from the optical source and to guide the optical signal; an optical sink, which is configured to receive the optical signal from the optical fiber and to convert the optical signal into an electrical signal; a detection unit, which is configured to detect at least one characteristic of the electrical signal, wherein the characteristic is at least partially caused by the intensity modulation of the optical signal; and a control unit, which is configured to control the optical source based on the detected characteristic.

Disclosed is an undersea power routing device including a first coupling port, a high voltage converter a second coupling port. The first coupling port may be configured to be coupled to an electrical power conductor and fiber optical cables of an undersea branch cable. The high voltage converter may be coupled to the first coupling port and operable to connect to the electrical power conductor via the first coupling port. The high voltage converter may be further operable to convert a high voltage electrical power supplied by the electrical power conductor to an output voltage having a lower voltage electrical power than the high voltage electrical power. The second coupling port may be configured to couple the high voltage converter to an interconnect cable. The high voltage converter, when coupled to the interconnect cable, may be operable to distribute the lower voltage electrical power to the interconnect cable.

A system for powering a network element of a fiber optic wide area network is disclosed. When communication data is transferred between a central office (CO) and a subscriber terminal using a network element to convert optical to electrical (O-E) and electrical to optical (E-O) signals between a fiber from the central office and twisted wire pair, coaxial cable or Ethernet cable transmission lines from the subscriber terminal, techniques related to local powering of a network element or drop site by the subscriber terminal or subscriber premise remote powering device are provided. Certain advantages and/or benefits are achieved using the present invention, such as freedom from any requirement for additional meter installations or meter connection charges and does not require a separate power network.

A method and a device used for remote control by optical fiber signals and power over Ethernet includes a power sourcing equipment (PSE) outputting a direct current (DC) via at least one network cable to at least one powered device (PD). When the PSE receives a second restarting signal from a signal controller, the PSE stops supplying power to the at least one PD. An optoelectric signal converter converts an optical signal from an Ethernet Switch to a digital signal for the signal controller. When the optical signal is determined by the signal controller to be interrupted after a first time duration passes, the signal controller outputs the second restarting signal to the PSE for restarting. After restarting, the PSE re-powers the at least one PD. The at least one PD is restarted remotely without requiring working personnel at the location of the at least one PD, improving restarting efficiency.

An optical communication system 1 includes an OLT 100 and an ONU 200. The ONU 200 includes a local power supply reception unit 202 capable of receiving power from an external power supply 300, a station-side power supply reception unit 204 connected to a station-side power supply 110 controlled by the OLT 100, via a power supply cable 120, and a power feeding switching unit 205 capable of selectively switching a state of the ONU 200 between a first state in which power feeding is performed by the local power supply reception unit 202 and a second state in which power feeding is performed by the station-side power supply reception unit 204. Upon an amount of power fed by the local power supply reception unit 202 falling below a prescribed amount in the first state, the ONU 200 transmits a power transmission request signal to the OLT 100 and switches from the first state from the second state via the power feeding switching unit 205. Upon reception of the power transmission request signal, the OLT 100 makes the station-side power supply 110 perform power transmission to a second power reception unit of the ONU 200.

A customer premises device including an optical modem including at least one upstream laser is power controlled to provide one or more reduced power levels of service in response to a detected AC input power failure, and/or in response to control commands, e.g., from an optical line terminal (OLT). The commands control the customer premises device to switch to a reduced power consumption mode of operation. During the reduced power mode one or a few lasers are powered, e.g., on an intermittent but predictable basis. During normal operation mode each of the upstream lasers are powered. One or more receiver circuits are also powered off during reduced power mode operation in some embodiments. A schedule is used in some embodiments to control when one or more upstream lasers and/or receivers are powered. In some embodiments the schedule is determined based on information provided by the OLT.

An optical power supply system includes a power sourcing equipment, a powered device, an information obtaining part and a power supply controller. The power sourcing equipment outputs feed light. The powered device converts the feed light into electric power. The electric power is supplied to a communicator. The information obtaining part obtains communication operation information on an operation status of communication that is performed by the communicator. Based on the obtained communication operation information, the power supply controller controls output of the feed light. The communicator is a wireless communicator that performs wireless communication. The communication operation information includes at least one of measured communication load information that is information on an actually measured communication load, potential communication load information that is information on a potential maximum communication load, and predicted communication load information that is information on a predicted communication load.

When, in each of optical submarine relay apparatuses of the optical submarine cable system in which the optical submarine relay apparatus is arranged in each relay section of an optical submarine cable, a Laser Diode (LD) driving device for excitation (11) for outputting an excitation light to excite an optical amplifier is configured to include a plurality of LD driving circuits whose requiring currents are different from one another, which are, for example, a first LD driving circuit (111a) of a required current Ia and a second LD driving circuit (111b) of a required current (Ib) therein, a power feeding line for feeing power to the first LD driving circuit (111a) and a power feeding line for feeing power to the second LD driving circuit (111b) are configured to be connected in parallel to each other.