Abstract: An optical module includes a semiconductor optical device, an optical fiber, a ferrule, and a mounting component. The optical fiber is optically coupled to the semiconductor optical device. The ferrule holds the optical fiber. The mounting component includes a first support groove for supporting the ferrule and a second support groove for supporting the optical fiber. The semiconductor optical device is mounted on the mounting component. The first and second support grooves are sequentially arranged in a direction of a predetermined axis. The second support groove has one end and the other end. The depth of the second support groove decreases from the one end toward the other end. With such a structure, the optical module allows the optical fiber to be positioned with high accuracy onto the mounting component.

Abstract: A device for directing one or more optical channels includes one or more micromirror elements. A micromirror element has a mirror and a mirror controller. The mirror is operable to reflect light at a first interaction area to yield a first passband for an optical channel, and to reflect light at a second interaction area to yield a second passband for the optical channel. The mirror controller operates to position the mirror at a first position at which light interacts with the first interaction area to yield the first passband, and to position the mirror at a second position at which light interacts with the second interaction area to yield the second passband.

Abstract: A secure fastener for joining fiber optic cables, is presented. The fastener includes a first segment having a first plurality of grooves to accommodate portions of the fiber optic cables, a first plurality of posts, a first plurality of apertures, and a first raised contoured portion and a second segment having a second plurality of grooves to accommodate portions of the fiber optic cables, a second plurality of posts, a second plurality of apertures, and a second raised contoured portion. The first plurality of posts of the first segment cooperates with the second plurality of apertures of the second segment and the second plurality of posts of the second segment cooperates with the first plurality of apertures of the first segment to secure the first and second segments to each other to form the fastener. The first and second raised contoured portions are configured to damage the fiber optic cables if the fastener is tampered with.

Abstract: An optical fiber assembly includes a central strength member, multiple tubes, stranded yarn, a water protection layer, reinforced strength yarns and an outer sheath. At least one of the multiple tubes has one or more optical fibers disposed within. The stranded yarn is formed around the multiple tubes and the central strength member. The water protection layer is formed around the stranded yarn. The reinforced strength yarns are formed around the water protection layer and the outer sheath is formed around the reinforced strength yarns. The optical fiber assembly has an overall diameter of less than about 11.5 mm and exhibits low strain when subjected to a tension of at least 600 pounds.

Abstract: A fiber optic rotary joint is provided that is unaffected by variations in the optical properties of a fluid that fills its internal cavity. The rotary joint includes a housing defining the internal cavity, first and second optical collimation arrays on opposite sides of the internal cavity, and a reversion prism between the optical collimation arrays. Further, the rotary joint includes an interface optical element proximate at least one of the first and second optical collimation arrays and the reversion prism. Each interface optical element includes an optically-flat surface adapted to contact the fluid such that optical signals that are oriented normal to the optically-flat surface can be transmitted without refraction, thereby rendering the optical signals immune to variations in the fluid's optical properties. A reversion prism assembly, an optical collimation assembly and a method of aligning an optical collimation array utilizing alignment pins are also provided.

Abstract: A frame includes a cabinet, a door, and a bracket. The cabinet has an opened front face. The door has a door frame and an inner door section. The door frame is connected to the cabinet for the door to open and close relative to the front face of the cabinet. The bracket connects the inner door section to the door frame such that the inner door section is offset from the front face of the cabinet by a separation distance and covers the front face of the cabinet from the separation distance when the door is closed. The bracket has a sufficient length such that the separation distance between the inner door section and the front face of the cabinet when the door is closed permits fiber optic components to extend through the front face of the cabinet without being compressed by the inner door section.

Abstract: An optical fiber having reduced residual stress discontinuity is disclosed. The optical fiber includes a core which is an optical transmission medium and a clad for surrounding the core. The residual stress discontinuity at an interface between the core and the clad is 20.0 MPa or less, which is represented by an absolute value of a difference between a minimum axial stress at (r/a)=0.8-1.1 and a maximum axial stress at (r/a)=1.0-1.2, wherein a is the radius of the core and r is a radius measured from the center of the core.

Abstract: An adjustable tether assembly for a fiber optic distribution cable includes a tether cable and an overmolded housing secured at the end of the tether cable having at least one connector port. The tether assembly is attached to the distribution cable such that the position of the connector port is adjustable along the length of the distribution cable for mitigating differences between the pre-engineered span length distance and the actual span length distance following installation of the distribution cable. A method for mitigating a span length measurement difference in a pre-engineered fiber optic communications network is provided that includes optically connecting an adjustable tether assembly at a mid-span access location of a fiber optic distribution cable and positioning a housing secured at the free end of a tether cable having at least one connector port at a desired location in the network to compensate for the span length measurement difference.

Abstract: A single side band modulation device includes a first Mach Zehnder interferometer and a second Mach Zehnder interferometer. The first Mach Zehnder interferometer includes at least two output arms, and the second Mach Zehnder interferometer includes at least two output arms. Terminals of the output arms are connected with one another.

Abstract: An optical fiber comprising a flame retardant UV light-curable tight-buffer coating coated onto the fiber, wherein said tight-buffer coating is substantially halogen-free, and has a limiting oxygen index of at least about 22%, and wherein said tight-buffer coating is removable from said fiber with a strip-force of less than about 1800 grams when the fiber is upjacketed with said coating at a line speed of at least 300 m/min.

Abstract: An optical waveguide based on a photochromic diarylethene polymer dispersed in a polymeric matrix, and a method for preparing such waveguide is disclosed.

Abstract: A wavelength division element includes a first filter and a second filter. The first filter has incident angle-to-transmission wavelength characteristics and separates multiplexed lights in a plurality of wavelength bands into first lights that are in a first wavelength band and first reflected lights. The first filter allows the first lights to pass through in a first direction and reflects the first reflected lights in a second direction. The second filter is located in the second direction and separates the first reflected lights into second lights that are in a second wavelength band and second reflected lights. The second filter allows the second lights to pass through in a third direction and reflects the second reflected lights in a fourth direction.

Abstract: An optical measurement device capable of improving optical spectrum measurement accuracy without the need to structurally decrease a slit width. A diffraction grating for dispersing measurement light into respective different wavelengths is rotated in a given direction to produce diffracted light of selected wavelengths. A focusing lens converges the diffracted light to produce a converged beam. A slit control section varies the slit width at a constant scan speed to open or close the slit, thereby varying the passing bandwidth for the converged beam. A light receiving/measuring section receives the light passed through the slit, obtains a level function indicative of the power level of the received light that varies with change in optical frequency, and differentiates the level function by the scan speed to reproduce the spectrum profile of the measurement light.

Abstract: An automated connectorization system for processing fiber optic connectors. The system can include one or more of a polishing station, a cleaning station, a tuning station, a testing station, an SC connector adjust station, an FC connector key press station, and a dust cap station. The connectors can be automatically conveyed and processed through the stations of the system from initial hackle removal through to dust cap application.

Abstract: For creating flat surfaces along the circumference of a polymer optical fiber of a round cross section by machining, the polymer optical fiber is wound onto a mandrel in a plurality of windings, the mandrel having a generally non-circular cross section with at least one projecting sector in which the radius is constant or, starting from an apex of the largest radius, in which the radius linearly decreases on both sides with an increasing angular distance to the apex, the machining including using a cutting chisel of a high quality for turning-off the polymer optical fiber in the projecting sector of the mandrel. Subsequently, the polymer optical fiber is cut to several pieces that can be used for the manufacture of optical splitters.

Abstract: A transceiver module comprised of a multiplexing/demultiplexing optical subassembly is provided. The optical subassembly includes either a transmitter module or a receiver module or both. The transmitter module has laser diodes emitting optical signals, which are reflected by reflectors, and coupled together by thin film filter. The receiver module includes thin film filters that decouple a received optical signal into constituent components. These components are reflected by reflectors to photo detectors by which the optical signals are converted into electrical signals. The reflector are capable of dual axis adjustment for adjustment of inclination thereof to effect active alignment. Further, the transmitter module and the receiver module define positioning recesses to position the laser diodes and photo detectors. The recesses are sized in accordance with the wavelengths associated with the laser diodes and photo detectors to effect passive alignment.

Abstract: Disclosed is an apparatus and method for managing and storing excess amounts of fiber-optic cable in a telecom rack. According to one embodiment, the apparatus comprises a fiber-optic cable slack take-up device attached to an arm. The arm is mounted to a supporting member attached to a side of the telecom rack and movable from a first stored position to a second deployed position. Access to the fiber-slack take-up device is provided by situating the arm in the second position. Situating the arm in the stored position places the slack take-up assembly, along with the excess fiber-optic cable, out of the way of operators working in the equipment aisle. Further embodiments provide means for safe-guarding the minimum bend radius of fiber-optic cable being used. The apparatus and method are useful for overcoming the space requirements of in-rack fiber storage systems known in the art.

Abstract: An optical waveguide device has: photonic crystal regions 305, each having holes 304 arranged in a periodic array; and an optical waveguide 302. Within the waveguide 302, high refractive index portions 303 are arranged along the waveguiding direction. Each of the high refractive index portions 303 is generally interposed between a pair of holes 304 which are in symmetric positions with respect to the center axis. The center of gravity of every high refractive index portion 303 is shifted along the waveguiding direction from a midpoint of a line interconnecting centers of the pair of holes 304, and is located between a position which is 0.45 r away from the midpoint in the waveguiding direction and a position which is 0.25 r away from the midpoint in the opposite direction, where r is a radius of each hole 304.

Abstract: An optical switch device for driving a movable member mounting a light reflection member thereon by a magnetic drive circuit, wherein, in an optical waveguide switching device (1) as an optical switch device, a movable member (2) mounting thereon an optical waveguide switching prism mirror (2) is driven in an X direction by a magnetic drive circuit while being floated from a fixing-side member (13) in order to improve stability of a light outputting position. When the movable member (2) is moved to a desired position in the X direction, power supply to solenoids (45, 46) is stopped in a clamp mechanism (40), and a clamp plate (41) presses the movable member (2) against the fixing-side member (13) to fix it. A V-groove (30) formed in the movable member (2) and a V-groove (31) formed in the fixing-side member (13) mesh each other to position the movable member (2) in the X direction.

Abstract: A telecommunications optical fiber distribution system is disclosed. The system comprises a support structure with an upper end, a lower end, a front side, a rear side, and a longitudinal axis. An input cable carrying an input signal and an output cable carrying an output signal is received into the system through the lower end. A plurality of signal splitters located at the upper end of the support structure split the input signal into a plurality of secondary signals. The system includes a plurality of adapters arranged radially about the longitudinal axis along the front side of the support structure. The adapters connect the secondary signals to the output signal. A cable management structure having portions located both along the front side between the plurality of adapters and the splitters and adjacent the back side manage and direct cables going from the input opening to the splitters and from the splitters to the adapters.