Abstract: A display waveguide configured for conveying image light to a viewer has a waveguide body whose refractive index varies in the thickness direction to include a high-index region between lower-index regions. Multi-layer and gradient index implementations are described. The waveguide transmits a portion of image light within the high-index region of the waveguide to provide a wider field of view.

Abstract: Fiber optic protection assembly for preventing fluid from entering into a fiber termination sub, including a sub having disc-receiving areas and inner channel connecting the disc-receiving areas. Disc-receiving areas receive plurality of discs, each disc having a disc channel. The sub includes tension bolts, each having a bolt channel. The sub receives a fiber tube or a Fiber in Metal Tube (FIMT) comprising fiber optic cables through bolt channels, disc channels of the discs and inner channel. Discs properly seal the void in the sub to ensure protection to the insulation, center conductor and fiber tube/FIMT. When the fiber optic protection assembly is lowered into the well, hydrostatic pressure compresses the discs and O-rings of the top tension bolt ensure protection to the insulation that houses the fiber tube. Compression of the discs ensures no pressure gets to the bottom tension bolt, thus protecting fiber optic strands from hydrostatic pressure.

Abstract: A gradient-index (GRIN) lens comprises an input surface defined by a body configured to receive electromagnetic (EM) waves from an aperture-constrained array; and an output surface defined by the body configured to output phase-aligned EM waves based on the received EM waves from the aperture-constrained array. The GRIN lens can be dimension-constrained in at least one dimension and can have a non-linear permittivity taper in at least a first dimension. The GRIN lens can provide gain for the received EM waves from the aperture-constrained array.

Abstract: An optical interface assembly, comprising a lens barrel, a lens disposed in the lens barrel, an optical receptacle, a stub disposed in the optical receptacle, and a diaphragm disposed between the lens and the stub. A diameter of a light passing hole of the diaphragm is smaller than a diameter of a light passing surface of the lens. A first end surface of the stub facing the lens is disposed at an inclined angle relative to an axis of the stub. When a light beam is coupled into the stub by the lens, a portion of a return light reflected from the first end surface is reflected to an outside of the light passing hole of the diaphragm.

Abstract: Passive optical couplers having passive optical activity indicators and methods of operating the same are disclosed. An example passive optical coupler for passively coupling first and second optical fibers includes a housing including: a first port configured to receive an end of a first optical fiber, and a second port configured to receive an end of a second optical fiber; and a passive optical activity indicator positioned at least partially within the housing, wherein a first portion of the passive optical activity indicator is exposed through the housing, and wherein the passive optical activity indicator is configured to passively illuminate in response to (i) first light propagating in the first optical fiber when the end of the first optical fiber is received in the first port, and (ii) second light propagating in the second optical fiber when the end of the second optical fiber is received in the second port.

Abstract: Embodiments of the disclosure relate to an optical fiber cable. The optical fiber cable includes a cable sheath having an interior surface and an exterior surface. The interior surface defines a longitudinal bore and the exterior surface defines an outermost surface of the optical fiber cable. The optical fiber cable also includes a plurality of micromodules disposed within the longitudinal bore. Each micromodule of the plurality of micromodules includes a micromodule jacket surrounding at least one optical fiber. The micromodule jacket of each of the plurality of micromodules is made of a first polymer composition having a first melt temperature, and the cable sheath is made of a second polymer composition having a second melt temperature that is less than the first melt temperature. The first polymer composition and the second polymer compositions are both low smoke, zero halogen materials.

Abstract: Disclosed here are embodiments of an optical fiber ribbon. In the optical fiber ribbon, a plurality of optical fibers are arranged in a row. The optical fibers are embedded in a primary matrix. The primary matrix comprises a base resin and an opacifier pigment. A secondary matrix is disposed around the primary matrix, and a layer of printing is disposed between the primary matrix and the secondary matrix. The secondary matrix has a contrast ratio of from 0.2 to 0.9 as measured according to ASTM D2805. Embodiments of a method of preparing an optical fiber ribbon are also disclosed in which optical fibers are arranged in a row and embedded in a primary matrix. Characteristics of the optical fibers is printed onto the primary matrix, and the primary matrix is coated with a secondary matrix having a contrast ratio of from 0.2 to 0.9 according to ASTM D2805.

Abstract: A structure for fixing a light guiding member includes a light guiding member that guides light emitted from a light source to a prescribed position, a holder that holds the light guiding member, and a fixed member fixed to the light guiding member. The holder includes an insertion hole through which the light guiding member is inserted. The light guiding member includes a flange larger in outer geometry than the insertion hole and a shaft portion connected to the flange and inserted through the insertion hole. The fixed member is fixed to a portion of the shaft portion that projects from the insertion hole and larger in outer geometry than the insertion hole.

Abstract: An optical device comprises a substrate, a waveguide disposed on the substrate, and a spot size converter (SSC) disposed on the substrate. The waveguide comprises a shoulder and a ridge. The SSC comprises a shoulder and a ridge. The ridge of the waveguide is aligned to a first stage of the ridge of the SSC. The waveguide is made of a first material. The shoulder and the ridge of the SSC are made of a second material. The second material is different from the first material.

Abstract: A paired simplex fiber optic connector assembly comprises a clip that holds two simplex LC connectors together to yield a duplex connector that can be plugged into a duplex adapter. In some embodiments, the two simplex connectors are held in place by rails formed on both sides of the clip. In other embodiments, a side arm is formed on each side of the clip, the side arm comprising a hub that extends from the clip and a non-circular flange formed on the end of the hub. The flange is configured to engage with channels formed on the sides of the simplex connectors, thereby holding the simplex connectors in place. The simplex connectors are attached to the clip by rotating the connectors about the flange, thereby engaging the channels with the flanges.

Abstract: A fiber optic connector has at least two optical fibers therein have end faces that are positioned such that they are directed in different directions. The end faces can be oriented relative to a key that is provided on a fiber optic connector housing that has a central opening in the main body of the fiber optic connector.

Abstract: Aspects and techniques of the present disclosure relate to a cable sealing structure comprising a cable sealing body including a gel and methods of making anisotropic behavior in cable sealing structures made with a dry silicone gel. In one aspect, various three-dimensional printing techniques are used to make a cable sealing structure that includes a gel. The cable sealing body has a construction that elastically deforms to apply an elastic spring load to the gel. The cable sealing body has a construction with anisotropic deformation characteristics that allows the cable sealing body to be less deformable in one direction than in others. The cable sealing structure can be utilized to seal fiber optic cables more uniformly while limiting the potential of leakage.

Abstract: A housing for enabling coupling of light from a light source to an optical light guide. The housing allows for the optical light guide to rotate about its axis with respect to the housing and a light source while at the same time maintaining the optical coupling with the light source. Accordingly, it is desirable to couple light from a light source to an optical light guide, where the optical light guide is freely rotatable about its axis. This is obtained by a locking mechanism of the housing where the light source is arrangeable. The locking mechanism includes a circumferential structure adapted to receive at least one radial locking member of the optical light guide. The circumferential structure is configured such that the optical light guide is rotatable about its axis in the locking mechanism while maintaining a spatial relationship between the end portion of the optical light guide and the light source.

Abstract: A shuffle assembly for a computing device comprises at least one chassis waveguide shuffle block having a plurality of chassis inputs and a plurality of chassis outputs, and having a plurality of optical waveguides formed therein connecting the chassis inputs to the chassis outputs in a desired chassis shuffle arrangement. The shuffle assembly may further comprise at least one line card waveguide shuffle block having a plurality of line card inputs, at least one of the plurality of line card inputs, a plurality of line card outputs, and a plurality of waveguides formed therein connecting the plurality of line card inputs to the plurality of line card outputs in a line card shuffle arrangement. At least one optical ribbon cable may couple the at least one chassis waveguide shuffle block to the at least one waveguide shuffle block.

Abstract: Methods and systems for an optical coupler for photonics devices are disclosed and may include a photonics transceiver comprising a silicon photonics die and a fiber connector for receiving optical fibers and including a die coupler and an optical coupling element. The die coupler may be bonded to a top surface of the photonics die and aligned above an array of grating couplers. The optical coupling element may be attached to the die coupler and the electronics die and the source module may be bonded to the top surface of the photonics die. Modulated optical signals may be received in the photonics die from optical fibers coupled to the fiber connector.

Abstract: An optical communication module includes a first power-supplied terminal to be brought into contact with a first power supply terminal to have a first power supply voltage applied thereto; a second power-supplied terminal to be brought into contact with the second power supply terminal to have a second power supply voltage applied thereto; a signal processing circuit, which is connected to the first power-supplied terminal and the second power-supplied terminal, configured to perform processing on a signal; and a power control circuit, which is provided between the first power-supplied terminal and the signal processing circuit, configured to control connection between the first power-supplied terminal and the signal processing circuit based on a voltage applied to the second power-supplied terminal.

Abstract: This invention discloses a parallel optical fiber transceiver module, comprising a laser array, a photodetector array, a driving circuit board and a two-dimensional optical fiber array; the laser array and the photodetector array are mounted in two rows on the driving circuit board, and aligned and coupled with two rows of optical fibers in the fiber array respectively, and glue is used for fixing; the two-dimensional optical fiber array is fabricated on a positioning substrate with both sides etched; the invention has the following beneficial effects: through the double-sided exposure technology in the microelectronic process, a mask pattern is made on both sides of a piece of quartz glass, and then a high-precision optical fiber positioning slot array is etched through the chemical etching process.

Abstract: Disclosed are a method and structure providing a silicon-on-insulator substrate on which photonic devices are formed and in which a core material of a waveguide is optically decoupled from a support substrate by a shallow trench isolation region.

Abstract: An optical fiber arranging tool has a base, a top surface, and a recessed channel extending along the base and has a plurality of ribs disposed within the recessed channel. The plurality of ribs have a pitch of 250 microns creating a plurality of grooves for receiving the optical fibers. The tool may also have a latch, there being a slot between the top surface of the base and an underside of the latch and in communication with the recessed channel. A method for aligning the optical fibers includes sliding individual optical fibers into a slot and the recessed channel, moving an object along the optical fibers in the recessed channel, passing the individual optical fibers through a respective one of a plurality of grooves created by ribs within the recessed channel and maintaining the individual optical fibers at a distance of 0.250 mm.

Abstract: A laser module includes one or more connectors and a laser source. The one or more connectors are configured to receive electrical power from, and to output a light beam to, a panel of a system. The laser source is configured to (i) be powered by the electrical power, and (ii) produce the light beam using the electrical power. The one or more connectors and the laser source are detachable from the panel, and when detached from the panel, the laser source is not powered by the electrical power.