Embodiments are directed to a rotor system for an aircraft comprising a gearbox configured to receive torque from a drive train, a mast having a first end and a second end, wherein the first end is attached to the gearbox and the mast configured to rotate in response to the torque from the drive train, a rotor hub attached to the second end of the mast, a first light transceiver mounted adjacent to the first end of the mast, wherein the first light transceiver is does not rotate relative to the mast, and a second light transceiver mounted adjacent to the second end of the mast, wherein the second light transceiver rotates with the mast.

A power over fiber system includes a power sourcing equipment, a powered device, an optical fiber cable, a power storage and a controller. 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 transmits the feed light from the power sourcing equipment to the powered device. The power storage stores the electric power. The controller performs a process of lowering an output level of the feed light in response to a value related to an electric power amount of the electric power stored in the power storage being equal to or higher than a predetermined threshold value, and performs a process of raising the output level in response to the value being lower than the predetermined threshold value.

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.

A system comprises a writer to form a plurality of color mits on a base material, wherein at least one of the color mits may represent computer-readable instructions comprising data other than pixel-image data. The plurality of color mits may include a first color mit and a second color mit, wherein the first color mit represents information data, and the second color mit represents that the first color mit contains a particular type of information data. The system also may include a reader to read colors of the plurality of color mits on the base material. The system may comprise a device to map at least one of the color mits to computer-readable instructions. The system may further comprise a processor configured to transmit signals using a colored light.

A system comprises a writer to form a plurality of color mits on a base material, wherein at least one of the color mits may represent computer-readable instructions comprising data other than pixel-image data. The plurality of color mits may include a first color mit and a second color mit, wherein the first color mit represents information data, and the second color mit represents that the first color mit contains a particular type of information data. The system also may include a reader to read colors of the plurality of color mits on the base material. The system may comprise a device to map at least one of the color mits to computer-readable instructions. The system may further comprise a processor configured to transmit signals using a colored light.

Systems and methods include causing perturbations across optical spectrum; probing responses across some or all of the optical spectrum after the perturbations; and determining a nonlinear transfer function based on the responses. The nonlinear transfer function can include a representation of any of end-to-end channel powers, Signal-to-Noise Ratio (SNR), Noise-to-Signal Ratio (NSR), Bit Error Rate (BER), Q, and Mean Squared Error (MSE).

Systems and methods include causing perturbations across optical spectrum; probing responses across some or all of the optical spectrum after the perturbations; and determining a nonlinear transfer function based on the responses. The nonlinear transfer function can include a representation of any of end-to-end channel powers, Signal-to-Noise Ratio (SNR), Noise-to-Signal Ratio (NSR), Bit Error Rate (BER), Q, and Mean Squared Error (MSE).

A non-powered passive optomechanical position switch and an operational control system for controlling an apparatus using an optical fiber waveguide, the switch including an orientable structure supporting a plurality of reflective surfaces at the terminus of the optical fiber waveguide, wherein at least some of the reflective surfaces each uniquely manipulates one or more properties of light received from the optical fiber waveguide in reflecting light back through the optical fiber waveguide to an optocontrolling transceiver. Orienting the orientable structure relative to the terminus of the optical fiber determines which of the plurality of reflective surfaces is positioned at the terminus of the optical fiber waveguide, and thereby determines what properties of light are manipulated and reflected back to the optocontrolling transceiver, through the optical fiber waveguide thereby controlling an apparatus.

An apparatus comprising a chip comprising a plurality of micro-emitters, the micro-emitters to couple to a plurality of data lines and to an optical fiber, wherein the micro-emitters are to generate optical signals for parallel transmission through the optical fiber, the optical signals corresponding to data communicated on the data lines.

In one embodiment, a method includes receiving at a remote network device, power and data from a central network device, wherein the power is used to power the remote network device, performing auto-negotiation with the central network device, wherein the auto-negotiation includes operating the remote network device in a low voltage mode during fault sensing of a power circuit at the remote network device, and selecting a power operating mode, wherein selecting the power operating mode includes selecting a high voltage mode if no fault is detected during the fault sensing, the high voltage mode comprising DC (direct current) pulse power. An apparatus is also disclosed herein.