Abstract: An optical transmission module includes a light emitting device for transmitting a first optical signal, a light receiving device for receiving a second optical signal, an optical fiber for guiding a third optical signal in which the first optical signal and the second optical signal are coupled, and an optical waveguide substrate having an optical waveguide made of first resin, wherein a groove formed on the optical waveguide substrate is provided with a prism having the optical fiber and a reflective face through which the first optical signal transmit, a first side face of the prism contacts a first wall face of the groove, and a second side face thereof contacts a second wall face of the groove.

Abstract: A beam branching device capable of suppressing an increase in the cost and the like even when the number of branching directions of an incident beam is large and increasing the coupling efficiency even when the rotation accuracy of a rotary motor is not increased too high and coping with high-speed switching of the optical path is provided. In a beam branching device, a rotation shaft of a rotary motor is rotated to rotate a rotating member together with a plurality of reflection mirrors so that an incident beam is reflected from a reflection mirror surface portion of any one of the plurality of reflection mirrors and the incident beam is branched to a plurality of directions to switch an optical path of a reflection beam.

Abstract: A guide pin wafer may include a base wafer that includes multiple dies. Each die may include a corresponding lens cutout. The guide pin wafer may also include multiple guide pins mounted on the base wafer. Each die of the base wafer may be mounted with two or more corresponding guide pins that may be configured to engage a parallel fiber connector to the corresponding die.

Abstract: A photonic device comprising a base plate, a photonic laser coupled to the base plate, wherein the photonic laser is configured to generate a light, a lens coupled to the base plate, wherein the lens is configured to receive the light from the photonic laser, form a focused light, and pass the focused light to a reflector, and the reflector incorporated with the base plate such that the lens is positioned between the photonic laser and the reflector, wherein the reflector is configured to receive the focused light, and wherein the reflector is configured to steer a first portion of the focused light through the base plate using total internal reflection.

Abstract: An optical connector includes a first sub-assembly that is factory-installed to a first end of an optical fiber and a second sub-assembly that is field-installed to the first end of the optical fiber. The optical fiber and first sub-assembly can be routed through a structure (e.g., a building) prior to installation of the second sub-assembly. The second sub-assembly interlocks with the first sub-assembly to inhibit relative axial movement therebetween. Example first sub-assemblies include a ferrule, a hub, and a strain-relief sleeve that mount to an optical fiber. Example second sub-assemblies include a mounting block; and an outer connector housing forming a plug portion.

Abstract: Disclosed herein is an optical waveguide element that includes a substrate and a waveguide layer formed on the substrate and comprising lithium niobate. The waveguide layer has a slab part having a predetermined thickness and a ridge part protruding from the slab part. The maximum thickness of the slab part is 0.05 times or more and less than 0.4 times a wavelength of a light propagating in the ridge part.

Abstract: On a top face (24a) of a base member (3), V-shaped grooves (15a) and (23a) are provided. On a reverse face (24b) of a base member (3), V-shaped grooves (15b) and (23b) are provided. The V-shaped grooves (15a) and (15b), which are first V-shaped grooves and are for holding optical fibers, and the V-shaped grooves (23a) and (23b), which are second V-shaped grooves and are for holding electrode rods (7), are formed facing each other, respectively. The positions of optical fibers and the electrode rods (7) are determined by the V-shaped grooves (15a) and (15b) and the V-shaped grooves (23a) and (23b), respectively.

Abstract: A beam-shaping optical system suitable for use with optical coherence tomography including a sheath defining a central cavity, a beam-shaping insert defining a beam-shaping element positioned within the central cavity, and an optical fiber having a core and a cladding. The optical fiber defines an angularly prepared fiber end configured to emit an electromagnetic beam toward the beam-shaping element with the core of the optical fiber locally expanded at the fiber end.

Abstract: An electro-optic device may include a photonic chip including an insulator layer, and a semiconductor layer over the insulator layer and defining an optical grating coupler. The optical grating coupler may have a series of alternating curved ridges and valleys. The optical grating coupler has first and second sides and a medial portion. The medial portion has a medial grating period T based upon a targeting wavelength. One or more of the first and second sides have a side grating period different than T.

Abstract: There is provided a method for producing a low-loss alkali metal-doped silica core optical fiber having excellent hydrogen resistance. The method for producing the optical fiber according to the present invention includes a drawing step of drawing an optical fiber preform in a drawing furnace to produce a silica glass-based optical fiber including a core region containing an alkali metal with an average concentration of 0.5 atomic ppm or more and a cladding region that surrounds the core region and a heating step of heating the optical fiber in a heating furnace through which the optical fiber drawn from the drawing furnace passes.

Abstract: Example telecommunications apparatus (100) include an enclosure (103) having an enclosure base (101) and a enclosure cover (102) that join together at a sealed interface. The enclosure cover (102) is latchable to the enclosure base (101). A splice tray assembly (106) is disposed within the interior (104) of the enclosure (103). The splice tray assembly (106) includes splice trays (150) mounted to a manager insert. A splitter (192) may be provided on the manager insert. The manager insert also may include a groove plate (160) latched to abase plate (180). One or more port assemblies (107-109) enable cables to enter and/or exit the enclosure (103) through sealed cable ports (145-147). The port assemblies (107-109) may provide anchors (214, 234) for cable strength members and/or organizers (243, 244, 253, 254) for fiber tubes.

Abstract: The present disclosure provides optical fiber preforms formed from core canes having large core-clad ratio, intermediate core-cladding assemblies, and methods for making the preforms and core cladding assemblies. The preforms are made from core canes having a contoured end surface. The contoured end surface(s) include a depression that acts to reduce the stress that develops at the junction of the end surface of the core cane with a soot cladding monolith arising from differences in the coefficient of thermal expansions of the core can and soot cladding monolith. The contoured end surface(s) leads to preforms having low defect concentration and low probability of failure during fiber draw.

Abstract: Provided is a technique for reducing, using a simple circuit configuration, an amplitude difference between electric signals that are input to respective optical waveguide arms. An optical modulator includes: an optical demultiplexer that splits continuous wave light as received; first and second optical waveguide arms through which the continuous wave light as split propagates; an optical phase ? shifter that introduces a phase shift of ? to the continuous wave light as split; an optical multiplexer combines the continuous wave light propagating through the first and second optical waveguide arms; first and second signal electrodes that respectively input the electric signals to the first and second optical waveguide arms; a junction capacitance connected in shunt to at least one of the first and second signal electrodes; and a DC voltage source that applies a DC voltage to the junction capacitance.

Abstract: An above-ground optical fiber cable installation consists of an optical fiber cable that is laid along an edge of a street (such as along a curb), and then covered with an adhesive overcoat material, such as a fast-curing epoxy and/or concrete repair/resurface compounds. The adhesive overcoat initially functions to affix the optical fiber cable to the street, and as it cures provides a protective encapsulation for the installed cable. The hard shell prevents exposure of the optical fiber cable to the environment and reduces the potential for damage from equipment that might otherwise cut through the cable. This type of cable installation is useful for situations that require rapid deployment, and avoids the need for creating either underground or aerial pathways.

Abstract: Embodiments of the invention include a compression-resistant seismic optical fiber cable for repeated deployment. The seismic optical fiber cable includes a central core tube dimensioned to receive at least one bundle of optical fibers. The central core tube is dimensioned to allow the optical fibers in the at least one bundle of optical fibers to relax relative to the other optical fibers. The seismic optical fiber cable also includes at least one strength member layer surrounding the central core tube. The strength member layer provides flexibility and tensile strength to the seismic optical fiber cable. The seismic optical fiber cable also includes a jacket surrounding the strength member. The seismic optical fiber cable also includes at least one rigid fiber reinforced composite rod linearly applied within the jacket. The one linearly-applied rigid fiber reinforced composite rod provides compressive resistance for the seismic optical fiber cable.

Abstract: An optical receiving device includes: a lens portion configured to refract incident light with a first wavelength and refract incident light with a second wavelength; a first beam splitter configured to let refracted light with the first wavelength transmit and reflect refracted light with the second wavelength; a second beam splitter configured to reflect transmitted light with the first wavelength; and a light receiver configured to receive reflected light with the first wavelength and reflected light with the second wavelength, wherein the first beam splitter and the second beam splitter are disposed so as to be separated by a difference in optical path length between the light with the first wavelength and the light with the second wavelength.

Abstract: The disclosure generally relates to sets of optical waveguides such as optical fiber ribbons, and fiber optic connectors useful for connecting multiple optical fibers such as in optical fiber ribbon cables. In particular, the disclosure provides an efficient, compact, and reliable optical fiber connector that incorporates an optically transmissive substrate combining the features of optical fiber alignment, along with redirecting and shaping of the optical beam.

Abstract: A waveguide structure is provided. A silicon substrate layer, a silicon waveguide layer, a first silicon dioxide layer, a silicide waveguide layer, and a second silicon dioxide layer are stacked in sequence, the silicon waveguide layer is a conical waveguide layer, the silicon waveguide layer and the silicide waveguide layer are coupled by using an evanescent wave, the silicide waveguide layer includes multiple first waveguide blocks and multiple second waveguide blocks, a material of the first waveguide blocks is the same as a material of the silicide waveguide layer, and a refractive index of a material of the second waveguide blocks is lower than a refractive index of the material of the first waveguide blocks. By using the waveguide structure, a waveguide flare size can be increased, so as to match a mode size of a fiber core of an optical fiber.

Abstract: A cell site includes a tower, a multi-service terminal mounted to the tower and a base transceiver station in communication with the multi-service terminal. The multi-service terminal includes a housing and a plurality of adapters mounted to the housing. Each of the adapters includes an outer port accessible from outside the housing and an inner port accessible from inside the housing.

Abstract: Low-coherence enhanced backscattering (LEBS) spectroscopy is an angular resolved backscattering technique that is sensitive to sub-diffusion light transport length scales in which information about the scattering phase function is preserved. Lens-based and lens-free fiber optic LEBS probes are described that are capable of measuring optical properties of a target tissue through depth-limited measurements of backscattering angles within the enhanced backscattered cone.