Abstract: An optical transmission power supply cable includes an electric power input terminal, a power sourcing equipment and an optical fiber cable. The power sourcing equipment includes a semiconductor laser that oscillates with electric power input from the electric power input terminal, thereby outputting feed light. The optical fiber cable transmits the feed light from the power sourcing equipment. The optical fiber cable has an electrically insulating property of not conducting electricity in a longer direction thereof.

Abstract: Power sourcing equipment of a power-over-fiber system includes a first laser, a second laser, and a light input/output part. The first laser oscillates with electric power to output feed light. The second laser oscillates with electric power to output feed light. The light input/output part inputs first feed light output by the first laser and second feed light output by the second laser to a single channel of an optical fiber. A light intensity distribution of the first feed light at an output end face of the channel differs from a light intensity distribution of the second feed light at the output end face of the channel. The first feed light and the second feed light are simultaneously input to the channel to reduce non-uniformity of a light intensity distribution at the output end face. Further, incident angles ?1 and ?2 are different from each other to reduce the non-uniformity of the light intensity distribution at the output end face.

Abstract: An optical power supply system includes a first data communication device and a second data communication device. The first data communication device includes a power sourcing equipment device including a first semiconductor laser; and a first transmitter including a second semiconductor laser and a first modulator. The second data communication device includes a powered device comprising a photoelectric conversion element; a receiver; a data processing unit; and a second transmitter including a third semiconductor laser and a second modulator. The first data communication device and the second data communication device perform optical communication with each other. The electric power obtained by the conversion of the feed light by the photoelectric conversion element is driving power for the second transmitter and the receiver.

Abstract: A first data communication device includes a first semiconductor laser for oscillating with electric power, and outputting feed light to a powered device of a second data communication device; a second semiconductor laser for first signals; a first modulator for modulating first laser light output by the second semiconductor laser to first signal light and outputting the first signal light to the second data communication device; and an optical receiver. The second data communication device includes the powered device having a photoelectric conversion element for converting the feed light into the electric power, a third semiconductor laser for second signals, and a second modulator for modulating second laser light output by the third semiconductor laser to second signal light and outputting the second signal light to the first data communication device. The optical receiver receives and converts the second signal light into an electrical signal corresponding to transmission data.

Abstract: A power over fiber system includes a power sourcing equipment, a powered device, an optical fiber cable and a converter. The power sourcing equipment includes a semiconductor laser that oscillates with electric power, thereby outputting feed light. The powered device includes a photoelectric conversion element that converts the feed light into electric power. The optical fiber cable has one end connectable to the power sourcing equipment and another end connectable to the powered device to transmit the feed light. The converter converts a wavelength of the feed light.

Abstract: A powered device of a power-over-fiber system includes a plurality of photoelectric conversion elements that convert feed light into electric power. The powered device further includes a beam splitter that receives the feed light, splits the feed light by wavelength into a plurality of feed light in a plurality of wavelength bands, and outputs the plurality of feed light in the plurality of wavelength bands to the plurality of photoelectric conversion elements in a distributed manner. Each of the plurality of photoelectric conversion elements has a conversion wavelength range corresponding to a respective one of the plurality of feed light input and is configured to convert the respective one of the plurality of feed light input into electric power.

Abstract: An optical fiber cable for feed-light transmission includes an optical fiber, a cable sheath, and a phosphor layer. The optical fiber includes a channel of feed light. The cable sheath is located at a periphery of the optical fiber and has a property of shielding the feed light. The phosphor layer is located between the optical fiber and the cable sheath and emits fluorescence upon receiving the feed light. The cable sheath has a property of allowing at least part of the fluorescence emitted by the phosphor layer upon receiving the feed light to pass therethrough.

Abstract: A photoelectric adapter includes a power sourcing equipment (PSE) device, an optical connector connection part and an electrical connector. The electrical connector is connectable to an electrical connector connection part of an electrical device. The PSE device includes a semiconductor laser that oscillates with electric power, thereby outputting feed light. The PSE device is driven by receiving the electric power supplied from the electrical device through the electrical connector, and outputs the feed light from the optical connector connection part. Another photoelectric adapter includes a powered device, an optical connector connection part and an electrical connector. The powered device includes a photoelectric conversion element that converts feed light into electric power. The powered device receives the feed light supplied through the optical connector connection part, converts the feed light into the electric power, and outputs the electric power from the electrical connector.

Abstract: A power over fiber system includes a power sourcing equipment, a powered device, an optical fiber cable and a converter. The power sourcing equipment includes a semiconductor laser that oscillates with electric power, thereby outputting feed light. The powered device includes a photoelectric conversion element that converts the feed light into electric power. The optical fiber cable has one end connectable to the power sourcing equipment and another end connectable to the powered device to transmit the feed light. The converter converts a wavelength of the feed light.

Abstract: An optical transmission power supply cable includes an electric power input terminal, a power sourcing equipment and an optical fiber cable. The power sourcing equipment includes a semiconductor laser that oscillates with electric power input from the electric power input terminal, thereby outputting feed light. The optical fiber cable transmits the feed light from the power sourcing equipment. The optical fiber cable has an electrically insulating property of not conducting electricity in a longer direction thereof.

Abstract: A photoelectric adapter includes a power sourcing equipment (PSE) device, an optical connector connection part and an electrical connector. The electrical connector is connectable to an electrical connector connection part of an electrical device. The PSE device includes a semiconductor laser that oscillates with electric power, thereby outputting feed light. The PSE device is driven by receiving the electric power supplied from the electrical device through the electrical connector, and outputs the feed light from the optical connector connection part. Another photoelectric adapter includes a powered device, an optical connector connection part and an electrical connector. The powered device includes a photoelectric conversion element that converts feed light into electric power. The powered device receives the feed light supplied through the optical connector connection part, converts the feed light into the electric power, and outputs the electric power from the electrical connector.

Abstract: A photoelectric adapter includes a power sourcing equipment (PSE) device, an optical connector connection part and an electrical connector. The electrical connector is connectable to an electrical connector connection part of an electrical device. The PSE device includes a semiconductor laser that oscillates with electric power, thereby outputting feed light. The PSE device is driven by receiving the electric power supplied from the electrical device through the electrical connector, and outputs the feed light from the optical connector connection part. Another photoelectric adapter includes a powered device, an optical connector connection part and an electrical connector. The powered device includes a photoelectric conversion element that converts feed light into electric power. The powered device receives the feed light supplied through the optical connector connection part, converts the feed light into the electric power, and outputs the electric power from the electrical connector.

Abstract: An optical power supply system includes a first data communication device and a second data communication device. The first data communication device includes a power sourcing equipment device including a first semiconductor laser; and a first transmitter including a second semiconductor laser and a first modulator. The second data communication device includes a powered device comprising a photoelectric conversion element; a receiver; a data processing unit; and a second transmitter including a third semiconductor laser and a second modulator. The first data communication device and the second data communication device perform optical communication with each other. The electric power obtained by the conversion of the feed light by the photoelectric conversion element is driving power for the second transmitter and the receiver.

Abstract: A first data communication device includes a first semiconductor laser for oscillating with electric power, and outputting feed light to a powered device of a second data communication device; a second semiconductor laser for first signals; a first modulator for modulating first laser light output by the second semiconductor laser to first signal light and outputting the first signal light to the second data communication device; and an optical receiver. The second data communication device includes the powered device having a photoelectric conversion element for converting the feed light into the electric power, a third semiconductor laser for second signals, and a second modulator for modulating second laser light output by the third semiconductor laser to second signal light and outputting the second signal light to the first data communication device. The optical receiver receives and converts the second signal light into an electrical signal corresponding to transmission data.

Abstract: A power over fiber system includes an optical fiber cable. The optical fiber cable includes a core, a first cladding and a second cladding. The core transmits signal light. The first cladding is positioned in contact with periphery of the core and transmits feed light. The second cladding is positioned in contact with periphery of the first cladding. Radial refractive index distribution of the first cladding is distribution in which refractive index gradually decreases from a local maximum at an internal point toward points where the first cladding is in contact with the core and the second cladding, respectively. The internal point is away from the core and the second cladding. The refractive index of the core is higher than the refractive index of the first cladding at the point where the first cladding is in contact with the core.

Abstract: A power sourcing equipment (PSE) device of an optical power supply system includes a semiconductor laser that oscillates with electric power, thereby outputting feed light. The semiconductor laser includes a semiconductor region exhibiting a light-electricity conversion effect. A semiconductor material of the semiconductor region is a laser medium having a laser wavelength of 500 nm or less. A powered device of the optical power supply system includes a photoelectric conversion element that converts feed light into electric power. The photoelectric conversion element includes a semiconductor region exhibiting a light-electricity conversion effect. A semiconductor material of the semiconductor region is a laser medium having a laser wavelength of 500 nm or less.

Abstract: A power over fiber system includes an optical fiber cable. The optical fiber cable includes a core, a first cladding and a second cladding. The core transmits signal light. The first cladding is positioned in contact with periphery of the core and transmits feed light. The second cladding is positioned in contact with periphery of the first cladding. Radial refractive index distribution of the first cladding is distribution in which refractive index gradually decreases from a local maximum at an internal point toward points where the first cladding is in contact with the core and the second cladding, respectively. The internal point is away from the core and the second cladding. The refractive index of the core is higher than the refractive index of the first cladding at the point where the first cladding is in contact with the core.

Abstract: A power sourcing equipment (PSE) device of an optical power supply system includes a semiconductor laser that oscillates with electric power, thereby outputting feed light. The semiconductor laser includes a semiconductor region exhibiting a light-electricity conversion effect. A semiconductor material of the semiconductor region is a laser medium having a laser wavelength of 500 nm or less. A powered device of the optical power supply system includes a photoelectric conversion element that converts feed light into electric power. The photoelectric conversion element includes a semiconductor region exhibiting a light-electricity conversion effect. A semiconductor material of the semiconductor region is a laser medium having a laser wavelength of 500 nm or less.

Abstract: A power over fiber system includes: a first data communication device including a power sourcing equipment device; a second data communication device including a photoelectric-conversion-and-optical-communication unit including a powered device; and an optical fiber cable. The first data communication device is capable of controlling low power supply and high power supply of the power sourcing equipment device. Feed electric power by the high power supply exceeds that by the low power supply. The first data communication device enables the high power supply after starting the low power supply to the second data communication device and receiving, therefrom, a signal indicating that the photoelectric-conversion-and-optical-communication unit has started.

Abstract: A power over fiber system includes: a first data communication device including a power sourcing equipment device; a second data communication device including a powered device; and an optical fiber cable. The first data communication device and the second data communication device perform optical communication with one another. The first data communication device is capable of controlling low power supply and high power supply that are performed by the power sourcing equipment device. Feed electric power by the high power supply exceeds feed electric power by the low power supply. The first data communication device starts up the second data communication device by the low power supply to the second data communication device, and enables the high power supply after receiving predetermined light from the second data communication device, and disables the high power supply before receiving the predetermined light.