Abstract: A sensor for measuring flow speed of a fluid, comprising: a light-absorbing optical fiber having a fiber Bragg grating inscribed in the fiber; wherein light is emitted into the light-absorbing optical fiber to heat the optical fiber and the fiber Bragg grating, and when the fluid passes over the sensor, the flow speed of the fluid is determined by the rate of heat loss from the sensor, and the temperature of the sensor is determined from the wavelength shift of the central wavelength of the fiber Bragg grating.

Abstract: A ferrule of the invention includes: a ferrule main body having a front edge and a rear edge; a fiber insertion hole into which an optical fiber is to be inserted; a recess provided at a top surface of the ferrule main body, having a reflection surface converting an optical path of a front end of the optical fiber into an optical path of a light emission-launch end provided at a lower surface side of the ferrule main body; a light emission-launch portion provided on the optical path of the light emission-launch end at a lower surface of the ferrule main body; a locating pin provided closer to the front edge than the light emission-launch portion at the lower surface of the ferrule main body; and a recessed portion provided between the locating pin at the lower surface of the ferrule main body and the light emission-launch portion.

Abstract: Apparatus and methods are described herein for cleaving an optical element at a defined distance from a splice (or other reference point/feature) of the optical element within a desired precision and/or accuracy. In some embodiments, a method includes receiving an indication of a location of a feature in an intermediate optical assembly visible within an image of the intermediate optical assembly. The feature can be for example, a splice. A position of the intermediate optical assembly is translated relative to a cleave unit based on the indication. After translating, the intermediate optical assembly, the intermediate optical assembly is cleaved to form an optical assembly that has an end face at a location disposed at a non-zero distance from the location of the feature. In some embodiments, the location of the feature can be determined with an image recognition system.

Abstract: New architectures for multicast switches, and other optical switches and splitters, that have substantially reduced insertion loss, crosstalk and better overall optical performance in comparison to existing optical switches and splitters. Optimized waveguide mesh layouts are used to substantially reduce the number of waveguide crossings, which reduces insertion loss. The reduction in the number of crossings also reduces the complexity of the mesh and provides better crossing angles to reduce crosstalk and other issues. Instead of crossing all of the waveguides connected between splitter outputs and switch inputs, the waveguides are crossed in sets of waveguides.

Abstract: An optical module includes a light emitting element, an optical fiber, a wavelength separating filter that is arranged at a predetermined angle with respect to a longitudinal direction of the optical fiber on a plane including the longitudinal direction of the optical fiber, and a lens for focusing light emitted from the light emitting element on the optical fiber via the wavelength separating filter. The light emitting element is arranged while being offset in a direction perpendicular to a central axis of the lens on a plane where the wavelength separating filter has the predetermined angle with respect to the central axis of the lens.

Abstract: A method for imaging a scan region by controlling at least one of the relative phase and relative amplitude of multiple optical modes propagating through a multimode optical fiber to control the position of an output beam emitted from the output facet of the optical fiber is disclosed.

Abstract: A multi-core optical fiber according to an embodiment of the present invention is provided with a plurality of core parts, a common cladding, and a coating. Particularly, in order to improve a spectral efficiency per unit sectional area, optical properties typified by the number of core parts, a sectional area of the entire multi-core optical fiber, the sum of power coupling coefficients to a core part n from all the other core parts, and a transmission loss, a non-linear refractive index, an effective area, and a chromatic dispersion of the core part n with the largest crosstalk from other core parts are set so as to satisfy a predetermined relation.

Abstract: The invention relates to a cable support (6,7,8) for distribution boxes (1), in particular for FTTH environments, the cable support (6,7,8) comprising at least one cable passage (6d, 7d, 8d), the cable passage (6d,7d,8d) adapted to receive at least one cable (19). Further, the invention relates to a distribution box (1) for cable distribution arrangements, in particular for FTTH environments, comprising a housing (2) and a cable support (6,7,8), the cable support (6,7,8) comprising a plurality of cable passages (6d,7d,8d), each cable passage (6d,7d,8d) adapted to receive at least one cable (19). To facilitate the maintenance of distribution systems and the installation of additional cables, the cable support (6,7,8) is a stackable modular assembly of at least two segment blocks (6a,6b,6c,7a,7b,7c,8a,8b,8c), each of which form, at a respective end (31,32) thereof pointing in or against a stacking direction (S), a part of at least one cable passage (6d,7d,8d).

Abstract: An FC-type optoelectronic assembly is provided that has a threaded plastic body that is adapted to mate with a threaded sleeve of an FC plug by engaging the threaded sleeve the FC plug with the threaded body of the FC-type optoelectronic assembly. The threaded plastic body is transparent to an operational wavelength of the FC-type optoelectronic assembly and has an optical element integrally formed therein. A TO-can header is housed in the threaded plastic body. A miniature PCB may be used for mounting the electrical and optoelectronic components of the TO-can header assembly on the header of the TO-can header assembly.

Abstract: The invention provides optical interconnects of data-processing cores of multicore chips by means of digital planar holographic microchips on a host chip. The device comprises “N” laser light sources that generate lights of “N” different wavelength and “N” data-processing cores that produce data. Each data-processing core contains optical signal receivers and modulators/transceivers that receive lights from the laser light sources and have a function of modulating the light obtained from the laser light sources with the data produced by the cores thus producing modulated light signals which are further processed by the holographic microchip and then decoded by the receivers. The device is efficient in that it replaces electrical interconnects between the cores with optical interconnects and can be matched to current semiconductor production technology.

Abstract: A piezoelectric ceramic that includes barium titanate and 0.04 mass % or more and 0.20 mass % or less manganese relative to barium titanate. The piezoelectric ceramic is composed of crystal grains. The crystal grains include crystal grains A having an equivalent circular diameter of 30 ?m or more and 300 ?m or less and crystal grains B having an equivalent circular diameter of 0.5 ?m or more and 3 ?m or less. The crystal grains A and the crystal grains B individually form aggregates and the aggregates of the crystal grains A and the aggregates of the crystal grains B form a sea-island structure.

Abstract: A mode-evolution compound converter for processing an optical signal that includes a first component having a fundamental transverse magnetic (TM) mode and a second component having a fundamental transverse electric (TE) mode is disclosed. The compound converter includes a set of multiple converters connected to form a compound converter, wherein each converter is a mode-evolution converter selected from a group including a polarization converter, a spatial converter, and combination thereof, wherein the polarization converter at least converts a mode of a polarization of at least one component of the optical signal, and the spatial mode converter at least converts a spatial mode order of at least one component of the optical signal.

Abstract: A connector assembly capable of efficiently dissipating heat is provided. The connector assembly includes: an optical cable; and a connector module, and the optical cable includes an optical fiber core wire, an outer cover provided around the optical fiber core wire, and a metallic braid provided between the optical fiber core wire and the outer cover, and the connector module includes a housing defining a space, and a circuit board received in the space of the housing and mounted with a photoelectric conversion unit connected with the optical fiber core wire, and the metallic braid of the optical cable and the circuit board of the connector module are thermally connected to each other.

Abstract: A single-mode optical fiber for transmitting optical signals includes a central core region for guiding the optical signals, and a cladding region surrounding the core region and including a void-containing annular layer containing randomly distributed voids, wherein the void-containing layer is doped with fluorine at a concentration of less than 1 wt % and has a radial thickness equal to or smaller than 3 ?m.

Abstract: Provided are an optical connector capable of improving optical alignment efficiency and an optical device having the same. The connector may include a body having a top surface and a bottom surface facing each other, through holes penetrating the body to connect the top and bottom surfaces, and alignment keys provided on at least side surface of the body to be parallel to the through holes.

Abstract: An image forming apparatus including a receiving part for receiving an image forming request, a conveyor belt for rotating and conveying a recording paper, a charging part for applying charges to the conveyor belt, and an image forming part for forming an image on the recording paper is disclosed. The image forming apparatus includes a cleaning part configured to clean a surface of the conveyor belt by rotating the conveyor belt and setting a contacting member in contact with the surface of the conveyor belt when a bias voltage of the charges is reduced. The cleaning part is configured to clean the surface of conveyor belt when a printing process and a post-printing process are completed by the image forming part and no subsequent image forming request is received by the receiving part.

Abstract: An optical modulator includes a first graphene and a second graphene on an upper surface of a semiconductor layer, a first electrode on the first graphene, and a second electrode on the second graphene. Respective side surfaces of the first graphene and the second graphene are separated from each other. A first ridge portion of the semiconductor layer and a second ridge portion on the second graphene constitute an optical waveguide, and the first and second graphenes are on a center portion of the optical waveguide in a vertical direction to the semiconductor.

Abstract: Gradient index (GRIN) lens assemblies employing lens alignment channels, as well as fiber optic connectors and fiber optic cable assemblies employing such GRIN lens assemblies, are disclosed. In one embodiment, a GRIN lens assembly includes a lens holder body having a mating face, a surface extending from the mating face, and a lens alignment channel. The lens alignment channel is defined by a narrow portion extending from the surface to a first depth and at least partially along a length of the surface, and a wide portion extending from the narrow portion to a second depth. A lens opening defined by the wide portion of the lens alignment channel at the mating face is disposed in the mating face. The wide portion of the lens alignment channel is configured to support a GRIN lens disposed in the lens alignment channel.

Abstract: A rotary optical link joint having a small change in transmission loss during rotational use is provided. In order to realize this, the rotary optical link joint according to the present invention is an optical link joint that relatively rotatably holds, centering around an axis line (19, 29), a first optical fiber (11) and a second optical fiber (21), wherein a part or all of the first optical fiber (11) and the second optical fiber (21) are configured by a multi-core optical fiber having a plurality of cores, and wherein the plurality of cores is arranged in a circular or annular area that is sectioned by a concentric circle centered around the axis line (19, 29) of the multi-core optical fiber.

Abstract: The invention relates to a fiber optic telecommunications module (100) comprising: a main housing portion (102) including a top wall (108), a bottom wall (110), a first transverse sidewall (106), a rear wall (112), an open front end (120), and an open second side (116), the main housing portion (102) including an optical component (130); a cover portion (104, 104a) coupled to the main housing portion (102) to close up the open second side (116) of the main housing portion (102) and keep the optical component (130) within the main housing portion (102); a first fiber optic adapter module (316) and a second fiber optic adapter module (316) removably coupled to the main housing portion (102) to close the open front end (120) of the main housing portion (102), the first and second fiber optic adapter modules (316) being provided in a stacked arrangement in a direction extending from the first transverse (106) sidewall toward the cover portion (104, 104a); wherein each of the first and second fiber optic adapter m