Abstract: Systems, devices, and techniques for performing wavelength division multiplexing or demultiplexing using one or more metamaterials in an optical communications systems are described. An optical device may be configured to shift one or more phase profiles of an optical signal using one or more stages of metamaterials to multiplex or demultiplex wavelengths of optical signals. The optical device may be an example of a stacked design with two or more stages of metamaterials stacked on top of one another. The optical device may be an example of a folded design that reflects optical signals between different stages of metamaterials.

Abstract: An actuator according to one aspect of the present invention includes a first member in which a shape is transformed from a first position, which is either rolled or flat, to a second position different from the first position, and a restoring force is stored when the shape is transformed from the first position to the second position, and a second member which is joined to the first member along the length direction of the first member and in which the shape of the second position is stored.

Abstract: An optical communication system can include a multiplexer/demultiplexer. The multiplexer/demultiplexer can transfer a first optical data signal between a first single-mode fiber and a first propagation mode of a few-mode fiber. The first propagation mode can have a first effective refractive index. The multiplexer/demultiplexer can transfer a second optical data signal between a second single-mode fiber and a combination of a second propagation mode of the few-mode fiber and a third propagation mode of the few-mode fiber. The second propagation mode and the third propagation mode can have a same effective refractive index that differs from the first effective refractive index. During propagation within the few-mode fiber, the second optical data signal can couple bidirectionally between the second propagation mode and the third propagation mode, while being substantially isolated from the first optical data signal in the first propagation mode.

Abstract: An apparatus for correcting duty-cycle and phase errors of quadrature signals, which is capable of simultaneously detecting a quadrature error and a duty cycle error of the quadrature signals at one observation point and correcting the quadrature error and the duty cycle error, and a method therefor are disclosed. The apparatus for correcting duty-cycle and phase errors of quadrature signals according to an embodiment of the present disclosure includes a quadrature signal error detector configured to detect errors of quadrature signals including an I signal, which is an in-phase signal, and a Q signal, which is a quadrature phase signal; and a quadrature signal error compensator configured to compensate for duty cycles and phases of the quadrature signals depending on the errors of the quadrature signals.

Abstract: Systems, devices, and techniques for performing wavelength division multiplexing or demultiplexing using one or more metamaterials in an optical communications systems are described. An optical device may be configured to shift one or more phase profiles of an optical signal using one or more stages of metamaterials to multiplex or demultiplex wavelengths of optical signals. The optical device may be an example of a stacked design with two or more stages of metamaterials stacked on top of one another. The optical device may be an example of a folded design that reflects optical signals between different stages of metamaterials.

Abstract: An optical system, comprising: (i) multiple input optical fibers; (ii) an optical mode multiplexer/demultiplexer coupled to said input optical fibers with, said optical mode multiplexer/demultiplexer comprising a plurality of metamaterial structures having length and forming at least one stage of metamaterials, the at least one stage of metamaterials is being situated on a surface of the optical mode multiplexer/demultiplexer facing the input optical fibers, and the at least one stage of metamaterials is oriented at angles between 60 and 120 degrees relative to the axis of the input fibers; and the metasurfaces are structured to receive a first optical signal having a first mode from at least one of said multiple input optical fibers and convert the first mode to a different mode.

Abstract: According to an embodiment, a source device for providing a screen sharing service with a sync device may include a display, a communication circuit configured to perform communication with the sync device, and a processor configured to receive a connection request for the screen sharing service from the sink device through the communication circuit, execute a home application for providing a home screen of the sink device according to the received connection request, display an execution screen of the home application on the display according to execution of the home application, and transmit image data corresponding to the displayed execution screen of the home application to the sink device through the communication circuit.

Abstract: Disclosed is a display device. The display device of the present disclosure includes: a flexible display panel; a cover sheet which is located in a rearward direction of the display panel, and has a plurality of holes; and a roller which extends long, and around or from which the display panel and the cover sheet are wound or unwound, wherein the cover sheet includes: a first section which extends long along a longitudinal direction of the roller; and a second section which extends long along the longitudinal direction of the roller, and is disposed side by side with the first section in a direction intersecting with the longitudinal direction of the roller; wherein the plurality of holes include: a plurality of first holes which are located in the first section, and disposed at a first interval; and a plurality of second holes which are located in the second section, and disposed at a second interval different from the first interval.

Abstract: An optical system, comprising: (i) multiple input optical fibers; (ii) an optical mode multiplexer/demultiplexer coupled to said input optical fibers with, said optical mode multiplexer/demultiplexer comprising a plurality of metamaterial structures having length and forming at least one stage of metamaterials, the at least one stage of metamaterials is being situated on a surface of the optical mode multiplexer/demultiplexer facing the input optical fibers, and the at least one stage of metamaterials is oriented at angles between 60 and 120 degrees relative to the axis of the input fibers; and the metasurfaces are structured to receive a first optical signal having a first mode from at least one of said multiple input optical fibers and convert the first mode to a different mode.

Abstract: Systems, devices, and techniques for performing wavelength division multiplexing or demultiplexing using one or more metamaterials in an optical communications systems are described. An optical device may be configured to shift one or more phase profiles of an optical signal using one or more stages of metamaterials to multiplex or demultiplex wavelengths of optical signals. The optical device may be an example of a stacked design with two or more stages of metamaterials stacked on top of one another. The optical device may be an example of a folded design that reflects optical signals between different stages of metamaterials.

Abstract: Systems, devices, and techniques for performing wavelength division multiplexing or demultiplexing using one or more metamaterials in an optical communications systems are described. An optical device may be configured to shift one or more phase profiles of an optical signal using one or more stages of metamaterials to multiplex or demultiplex wavelengths of optical signals. The optical device may be an example of a stacked design with two or more stages of metamaterials stacked on top of one another. The optical device may be an example of a folded design that reflects optical signals between different stages of metamaterials.

Abstract: According to an embodiment, a source device for providing a screen sharing service with a sync device may include a display, a communication circuit configured to perform communication with the sync device, and a processor configured to receive a connection request for the screen sharing service from the sink device through the communication circuit, execute a home application for providing a home screen of the sink device according to the received connection request, display an execution screen of the home application on the display according to execution of the home application, and transmit image data corresponding to the displayed execution screen of the home application to the sink device through the communication circuit.

Abstract: An actuator according to one aspect of the present invention includes a first member in which a shape is transformed from a first position, which is either rolled or flat, to a second position different from the first position, and a restoring force is stored when the shape is transformed from the first position to the second position, and a second member which is joined to the first member along the length direction of the first member and in which the shape of the second position is stored.

Abstract: This application relates to a multifunctional recovery apparatus of shore adhesion oils. The multifunctional recovery apparatus of shore adhesion oils removing and recovering oil spilling and sticking at a shore is mounted on a four-wheel vehicle. A skimmer assembly separating oil sticking to the surface of rocks at a shore, and absorbing and recovering an oil spill at the shore is installed at the front of the four-wheel vehicle. The skimmer assembly includes a rotary skimmer having a rotary roller separating oil, and a vacuum suction skimmer suctioning oil floating on a water surface. The rotary skimmer and the vacuum suction skimmer may be selectively or simultaneously used, if necessary.

Abstract: This application relates to a multifunctional recovery apparatus of shore adhesion oils. The multifunctional recovery apparatus of shore adhesion oils removing and recovering oil spilling and sticking at a shore is mounted on a four-wheel vehicle. A skimmer assembly separating oil sticking to the surface of rocks at a shore, and absorbing and recovering an oil spill at the shore is installed at the front of the four-wheel vehicle. The skimmer assembly includes a rotary skimmer having a rotary roller separating oil, and a vacuum suction skimmer suctioning oil floating on a water surface. The rotary skimmer and the vacuum suction skimmer may be selectively or simultaneously used, if necessary.