The invention relates to an anti-resonance ele-ment preform for producing an anti-resonant hollow-core fiber, in an axial top view comprising a circular first cir-cle element with a first circle radius and a circular arc-shaped first circular arc element with a first circular arc radius. Furthermore, the invention relates to a method for producing an anti resonance element preform, a preform for producing an anti-resonant hollow-core fiber comprising at least one anti-resonance element preform and an anti-resonant hol-low-core fiber. According to the invention, it is provided that the first circle element and the first circular arc element are connected to one another at two contact points.

An optical fiber is provided that includes a core region and a cladding region. The core region is formed of silica glass doped with chlorine and/or an alkali metal. The cladding region surrounds the core region and includes an inner cladding directly adjacent to the core region, an outer cladding surrounding the inner cladding, and a trench region disposed between the inner cladding and the outer cladding in a radial direction. The trench region has a volume of about 30% -micron.sup.2 or greater. Additionally, the optical fiber has an effective area at 1550 nm of about 100 micron.sup.2 or less.

Disclosed are high-density energy directing devices and systems thereof for two-dimensional, stereoscopic, light field and holographic head-mounted displays. In general, the head-mounted display system includes one or more energy devices and one or more energy relay elements, each energy relay element having a first surface and a second surface. The first surface is disposed in energy propagation paths of the one or more energy devices and the second surface of each of the one or more energy relay elements is arranged to form a singular seamless energy surface. A separation between edges of any two adjacent second surfaces is less than a minimum perceptible contour as defined by the visual acuity of a human eye having better than 20/40 vision at a distance from the singular seamless energy surface, the distance being greater than the lesser of: half of a height of the singular seamless energy surface, or half of a width of the singular seamless energy surface.

The disclosed embodiments generally relate to extruding multiple layers of micro- to nano-polymer layers in a tubular shape. In particular, the aspects of the disclosed embodiments are directed to a method for producing a Bragg reflector comprising co-extrusion of micro- to nano-polymer layers in a tubular shape.

Disclosed embodiments include an energy directing device having one or more energy relay elements configured to direct energy from one or more energy locations through the device. In an embodiment, surfaces of the one or more energy relay elements may form a singular seamless energy surface where a separation between adjacent energy relay element surfaces is less than a minimum perceptible contour. In disclosed embodiments, energy is produced at energy locations having an active energy surface and a mechanical envelope. In an embodiment, the energy directing device is configured to relay energy from the energy locations through the singular seamless energy surface while minimizing separation between energy locations due to their mechanical envelope. In embodiments, the energy relay elements may comprise energy relays utilizing transverse Anderson localization phenomena.

A preparation method for a low oxygen content semiconductor core composite material optical fibre preform comprise: (1) in a nitrogen gas atmosphere glovebox, tightly packing semiconductor core raw material powder into a central hole of a cladding glass tube which is sealed at one end; and (2) performing vacuum pumping on the cladding glass tube packed with the semiconductor core raw material powder, and simultaneously sealing another end of the hot-drawn glass tube to vacuum sealing the semiconductor core raw material powder within the cladding glass tube, so as to obtain the low oxygen content semiconductor core composite material optical fibre preform. The method solves problems in the traditional optical fibre preform preparation methods such as poor packing tightness, high oxygen content in drawn fibre cores, and poor transmission performance in prepared optical fibres.

Optical fibers are described that include integrated Photovoltaic (PV) cells. One embodiment comprises a method of integrating a photon converter into an optical fiber. The method comprises acquiring an optical fiber having a core that is configured to convey light. The method further comprises cleaving the optical fiber to form a first length and a second length, and fabricating a photon converter onto an end of the first length of optical fiber, where the photon converter includes a void that allows the light through the core to traverse across the splice. The method further comprises splicing the end of the first length of the optical fiber to an end of the second length of the optical fiber.

A method determines four dimensional (4D) plenoptic coordinates for content data by receiving content data; determining locations of data points with respect to a first surface to creating a digital volumetric representation of the content data, the first surface being a reference surface; determining 4D plenoptic coordinates of the data points at a second surface by tracing the locations the data points in the volumetric representation to the second surface where a 4D function is applied; and determining energy source location values for 4D plenoptic coordinates that have a first point of convergence.

Optical fibers are described that include integrated Photovoltaic (PV) cells. One embodiment comprises a method of integrating a photon converter into an optical fiber. The method comprises acquiring an optical fiber having a core that is configured to convey light. The method further comprises cleaving the optical fiber to form a first length and a second length, and fabricating a photon converter onto an end of the first length of optical fiber, where the photon converter includes a void that allows the light through the core to traverse across the splice. The method further comprises splicing the end of the first length of the optical fiber to an end of the second length of the optical fiber.

Systems and methods for nanofiller in an optical interface are provided. One system includes a fiber-optic interface for one or more optical fibers that includes a body including one or more grooves defined therein. At least one groove in the one or more grooves is configured to receive a corresponding optical fiber of the one or more optical fibers. The at least one groove of the one or more grooves is further configured to receive an adhesive to attach the body to a portion of the corresponding optical fiber. Further, fiber-optic interface includes a suspended structure associated with the at least one groove configured to couple light between the suspended structure and the corresponding optical fiber. Also, the adhesive comprises nanofiller configured to support an alignment of the suspended structure with the corresponding optical fiber within the at least one groove.