Abstract: An all-optical logic gates comprises a nonlinear element such as an optical resonator configured to receive optical input signals, at least one of which is amplitude-modulated to include data. The nonlinear element is configured in relation to the carrier frequency of the optical input signals to perform a logic operation based on the resonant frequency of the nonlinear element in relation to the carrier frequency. Based on the optical input signals, the nonlinear element generates an optical output signal having a binary logic level. A combining medium can be used to combine the optical input signals for discrimination by the nonlinear element to generate the optical output signal. Various embodiments include all-optical AND, NOT, NAND, NOR, OR, XOR, and XNOR gates and memory latch.

Abstract: An optical fiber device with an optical fiber extending from a first outer jacket through a fiber receiving device from a first outer jacket to a second outer jacket. The first outer jacket is anchored to a side of a housing of the fiber receiving device and the second outer jacket is anchored to a side of the fiber receiving device. The housing defines an interior which received the optical fiber and provides space for accumulating excess length of optical fiber generated by differential thermal contraction of the jackets and the optical fiber.

Abstract: A device for measuring a force exerted by a ferrule of a fiber optic connector includes a base including an adapter mount configured to accept one of a plurality of adapter assemblies, and a stage coupled to the base, the stage moving longitudinally with respect to the base. The device also includes a force gauge coupled to the stage, and an adapter assembly configured to be coupled to the adapter mount of the base, the adapter assembly defining an adapter configured to receive the fiber optic connector. The fiber optic connector is connected to the adapter assembly, and the force gauge measures the force exerted by the ferrule of the fiber optic connector. Systems and methods for measuring the force exerted by the ferrule of a fiber optic connector are also included.

Abstract: A printed circuit board (18) for electrically connecting to an optical subassembly (16) includes a board base (230), a conductive trace (232), and a board conductor (234). The optical subassembly (16) includes at least one component pad (346). The board base (230) is made of a substantially nonconductive material. Further, the board base (230) defines a recessed region (238) that is sized and shaped to receive a portion of the optical subassembly (16). The conductive trace (232) is secured to the board base (230). The board conductor (234) is positioned near the receiver region (238). Further, the board conductor (234) is positioned near the component pad (346) when the optical subassembly (16) is positioned in the receiver region (238). Moreover, the board conductor (234) is electrically connected to the conductive trace (232).

Abstract: An endoscope has an optical fiber and at least one photo-detector. The optical fiber has a core that transmits illuminating light and at least one cladding that surrounds the core and transmits reflected light. The cladding has a refraction slope surface that is tapered toward a direction opposite the tip portion of the optical fiber. The photo-detector detects the reflected light that exits from the refraction slope surface by refraction.

Abstract: An optical and/or electrical communication and structural fabric, method and system. For one aspect, an optical fabric is embedded within a structure to communicate an optical and/or electrical signal and to stiffen the structure. The structure may be a circuit board, for example, and the optical cloth may be used to interconnect devices coupled to the circuit board. For another aspect, the structure may be a different type of structure such as, for example, part of a vehicle, airplane or other structure.

Abstract: A stepped light guide has an incident surface, an emitting surface and a stepped reflecting structure. The emitting surface is adjacent to the incident surface. The stepped reflecting structure is adjacent to the incident surface, faces the emitting surface and has a proximal end, a distal end, multiple planar surfaces and multiple inclined surfaces. The proximal end is adjacent to the incident surface. The distal end is opposite to the proximal end. The planar surfaces are parallel to and separated from the emitting surface by a depth, the depth being gradually reduced from the proximal end to the distal end. The inclined surfaces are formed between every two adjacent planar surfaces. The light guide effectively changes a linear or point light source into a surface light source having uniform illumination.

Abstract: A flexible printed circuit capable of transmitting electrical and optical signals is disclosed. The flexible printed circuit includes a set of optical waveguides for transmitting optical signals and a set of conductors for transmitting electrical signals. Each of a subset of the optical waveguides is enclosed by a respectively one of the conductors. The optical waveguide is made of glass or plastic. The conductors are formed within a first building block constructed by a first dielectric layer and a first substrate layer, and a second building block constructed by a second dielectric layer and a second substrate layer.

Abstract: Roughly described, arrayed waveguide grating apparatus includes one or more input and/or output waveguides which are shaped and oriented such that optical energy communicated with the waveguide array is, within a distance of no more than 1 mm into the mouth of the waveguide, directed substantially in-line with the optical centerline of the waveguide. In one embodiment, the waveguides are shaped and oriented such that the optical energy enters or exits the waveguide substantially-line with the optical centerline of each waveguide. In another embodiment the waveguides are shaped and oriented such that optical energy is, at the mouth of each waveguide, directed off-axis, and the waveguide includes mode conversion means such that optical energy is directed substantially in-line with the optical centerline within a distance of no more than 1 mm into the mouth of the waveguide. The mode conversion means may, for example, include a non-adiabatic lateral optical centerline shift.

Abstract: What is described here is a method of or a device for transferring optical signals. An optical conductor including a light-conducting core, which has at least two parallel interfaces provided with coatings that result in a reflection of the light guided in the light-conducting core, comprises at least one means for coupling the emitter or the receiver, respectively, by diffraction, refraction or diffusion.

Abstract: A liquid-crystal optical element comprises a plurality of wiring electrodes formed between a plurality of segment electrodes and a lower transparent substrate and connected electrically to the segment electrodes, individually, and a plurality of contact electrodes connected to the segment electrodes and the corresponding wiring electrodes. The adjacent segment electrodes are different in height position above the lower transparent substrate. A contact electrode that is connected to that one of each two adjacent segment electrodes which is situated on the side of a liquid crystal layer is connected to the destination segment electrode inside its edge, when viewed along a section formed by cutting the segment electrode in the direction perpendicular to the planes of the lower and an upper transparent substrate.

Abstract: An optical fiber includes a cladding with a material having a first refractive index and a pattern of regions formed therein. Each of the regions has a second refractive index lower than the first refractive index. The optical fiber further includes a core region and a core ring surrounding the core region and having an inner perimeter, an outer perimeter, and a thickness between the inner perimeter and the outer perimeter. The thickness is sized to reduce the number of ring surface modes supported by the core ring.

Abstract: The present invention relates to a method of manufacturing a reflective polarizing film for a liquid crystal display device in which cholesteric liquid crystal layers having different selective light-reflecting wavelengths are laminated in the laminated coating method, thus a forming liquid crystal film that covers a visible light region and ¼? retardation film are attached to the liquid crystal film. In this case, two or more cholestric liquid crystal layers having different selective light-reflecting wavelengths are laminated in order from the shorter wavelength to the longer wavelength in the laminated coating method. Further, during the lamination, orientation layers are laminated between the liquid crystal layers to maximize the selective reflection characteristic of the cholesteric liquid crystal.

Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a hyperboloidal face or a paraboloidal face and have a finite focal distance on the emission side of illumination light. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2)) (where R is the radius of curvature of a distal end vertex, and K is a conic constant).

Abstract: The present disclosure relates to a fiber optic connector for use with a fiber optic adapter. The fiber optic connector includes a connector housing having an end defining a plug portion. A ferrule assembly is mounted at least partially within the connector housing. The ferrule assembly includes a ferrule located at the plug portion of the connector housing. A sealing member is mounted about an exterior of the connector housing for providing a seal between the connector housing and the adapter. The fiber optic connector further includes first and second separate retaining mechanism for retaining the fiber optic connector within the fiber optic adapter.

Abstract: A transmission fibre with optical amplification, comprising a core and a cladding. The core material is doped with a first dopant of a material having a higher index of refraction than the material of the cladding and with a second dopant of a material that converts pump energy in the form of light having a first wavelength into light having a second wavelength. The concentration of the second dopant within the core increases in radial direction in proportion to the distance to the centre of the core. The core material is preferably doped with a third dopant for compensating the variation in the refractive index caused by the second dopant. The cladding may comprise a cladding layer surrounding the core provided with a fourth and a fifth dopant for signal amplification and refractive index compensation, respectively, in the cladding layer. The dopants have been selected to enable amplification, using the Raman effect or stimulated emission.

Abstract: Integrated opto-electronic oscillators that use micro resonators in the optical section of the opto-electronic feedback loop.

Abstract: An optical fiber cable management panel includes drawer assemblies, each including a drawer slidable within a chassis. The drawer assemblies are secured together by a bracket that includes an interlock arrangement with the chassis. Such an interlock arrangement includes a non-threaded stud engaging a hole. Radius limiters may be part of the drawer assembly and include a cable entry aperture have a closed perimeter and a flared cable guide surface around most of, and preferably all of, the closed perimeter to allow for the entry of cables from all directions. A control mechanism controls movement of the radius limiter relative to the drawer assembly. The control mechanism includes a rotating member that has an axis of rotation transverse to the slidable motion of the radius limiter and normal to the radius limiter.

Abstract: According to embodiments of the present invention, a cable sealing assembly for providing an environmental seal about a cable includes a housing, a flowable cable sealant and a compression feature. The housing includes first and second housing parts. The first housing part defines a cable passage to receive a cable having a lengthwise cable axis. The cable sealant is disposed in the cable passage. The compression feature forms at least a part of the second housing part and is movable in an installation direction between a ready position and an installed position. The compression feature is shaped and configured to force the cable sealant to flow about the cable in a direction transverse to the cable axis to circumferentially surround a portion of the cable when the compression feature is moved from the ready position to the installed position.

Abstract: The contactless connector comprises a rotation-side light element on a rotating body that rotates about an axis of rotation and a fixed side light element on a fixed body that is fixed, and the rotating body further comprises a reflective body that rotates about the axis of rotation. The two light elements are constituted so that a light path is formed between the two light elements when a specified fixed-side light element is located on a light path line segment where light that is emitted from a specified rotation-side light element is reflected by the reflective body. The reflective body is rotated at half the rotation speed of the rotating body.