Abstract: Embodiments described herein include a waveguide combiner having an edge coated with an optically absorbent composition and a method of coating the edge of the waveguide combiner with the optically absorbent composition. The optically absorbent composition includes one or more types of nanoparticles or microparticles, at least one of one or more dyes or one or more pigments, and a polymer matrix of one or more binders. The method includes producing an optically absorbent formulation. The optically absorbent formulation includes one or more types of particles, at least one of one or more dyes or one or more pigments, one or more binders, and one or more solvents. The optically absorbent formulation is applied on an edge of a waveguide combiner using an edge blackening tool. The formulation is cured with radiation to form the optically absorbent composition.

Abstract: An optical module includes a shell, a circuit board, a display light and a light guide pipe. The circuit board is disposed in the shell. The display light is disposed on the circuit board, and is configured to emit light of different colors. The light guide pipe is disposed between the shell and the circuit board. An input end of the light guide pipe is arranged to correspond to the display light, an output end of the light guide pipe is configured to transmit light emitted by the display light to an outside of the optical module. The shell includes a groove. The output end of the light guide pipe is fixed in the groove, so that the shell is fixed with the light guide pipe.

Abstract: Devices, assemblies and methods for fixing and grounding telecommunications cables entering telecommunications closures. A plurality of cable fixation units are independently conductively coupled to components of a grounding assembly with conductive couplers. The conductive couplers are attached to a grounding bar that is fixed relative to the cable fixation units.

Abstract: In part, the disclosure relates to an optical coupler. The optical coupler may include two ridge waveguides that include a first waveguide and a second waveguide. One or more segments of the two waveguides extend over a coupling length or other distance. One or more sections of each ridge waveguide is at least partially defined by a set of cross-sectional profiles, a plurality of sections of each ridge waveguide have a width that tapers along a length of the two ridge waveguides. Within the coupling length, a subset of the set of cross-sectional profiles may define a first pair of transition regions and a second pair of transition regions. The coupler may include a coupling region between the two ridge waveguides and spanning at least a section of the coupling length.

Abstract: The present disclosure provides a hollow-core microstructure optical fiber preform, an optical fiber, and a method for manufacturing thereof. An objective of the present disclosure is to introduce a support sheet into a nested structure unit of the hollow-core microstructure optical fiber preform, which not only increases the number of reflection surfaces without increasing the number of nested layers of glass tubes, but also achieves a more accurate positioning by the support sheet and improves manufacturing accuracy as compared to a tangential structure of nested glass tubes, such that the following technical problems, difficulty in controlling a curvature of reflection surfaces, low manufacturing accuracy, large difference between actual loss and theoretical loss, or poor batch consistency, in related anti-resonance optical fibers, caused by increasing the number of layers of nested microstructure units in order to increase the number of reflection surfaces, are solved.

Abstract: Apparatus and methods for measuring the deformation in a floating-roof seal assembly. A fiber optic cable is attached along its length to the floating-roof seal assembly such that the fiber optic cable is deformed when the floating-roof seal assembly is deformed. Deformation of the fiber optic cable and the seal assembly can be determined based on how the light interacts with the fiber optic cable. This helps allow tanks with a floating roof to be monitored.

Abstract: An optical coupling device includes an optical waveguide disposed on a substrate. An index of refraction of the optical waveguide is greater than an index of refraction of the substrate. The optical coupling device includes a cladding material disposed alongside and above the optical waveguide. An index of refraction of the cladding material is less than the index of refraction of the optical waveguide. The optical coupling device includes an optical buffering layer disposed within the cladding material above the optical waveguide. The optical buffering layer has an index of refraction greater than the index of refraction of the cladding material. The optical buffering layer is positioned a distance away from a top surface of the optical waveguide so as to guide an input optical mode at controlled vertical level relative to the optical waveguide, with the input optical mode overlapping the optical waveguide.

Abstract: Telecommunication enclosures are provided. A terminal enclosure for a telecommunications system includes a housing including a base and a cover, the housing defining an internal volume configured to receive one or more telecommunication elements therein, wherein the base includes a first side and a second side opposite the first side, wherein the base and cover are pivotally coupled together at a hinged interface to selectively close the internal volume of the housing, and wherein the hinged interface is reconfigurable between the first and second sides of the base.

Abstract: An optical fiber sensing system is acquired by adding an optical fiber sensing function to an optical communication cable system, and the optical fiber sensing is performed by an interrogator by sending probe light to an optical fiber, detecting backscattered light of the probe light, and performing sensing on environmental information around the optical fiber. A first sensing device installed at a remote place different from a terminal station of the optical communication cable system includes the interrogator, a power source unit configured to receive power via the optical communication cable system and supply power into the device, and a communication unit configured to communicate with a second sensing device. The interrogator generates sensing data at each point on the optical fiber by performing sensing on environmental information around the optical fiber being connected to the first sensing device.

Abstract: Fiber optic connectors and connectorized fiber optic cables include connector housings having locking portions defined on the connector housing that allow the connector housing to be selectively coupled to a corresponding push-button securing member of a multiport assembly. Methods for selectively connecting a fiber optic connector to and disconnecting the fiber optic connector from the multiport assemblies allow for connector housings to be forcibly and nondestructively removed from the multiport assembly.

Abstract: Disclosed herein are preconnectorized cable assemblies and methods of making using a pull string. One embodiment of the disclosure relates to a method of manufacturing a distribution cable assembly using a pull string fed through a jacket of a distribution cable. Subunit cables are attached to the pull string through openings in the jacket of the distribution cable, and then pulled, via the pull string, through the jacket until drawn through a distribution end opening of the jacket. Another embodiment relates to a distribution cable assembly including junction shells covering side openings in the jacket. The junction shell includes a first half shell attached to a second half shell by a fastener. The first half shell includes stops proximate ends of a side opening to fix the junction shell along an axis of the jacket.

Abstract: An augmented reality (AR) device is provided. The AR device includes a display configured to output light of a first polarization; a polarization-conversion reflector provided opposite to an output side of the display, the polarization-conversion reflector converting the light of the first polarization into light of a second polarization that is orthogonal to the first polarization and reflect the light of the second polarization; a waveguide having a flat plate shape, a normal line of a flat surface of the flat plate shape being inclined with respect to an optical axis of the light of the first polarization output from the display, a side of the waveguide being provided between the display and the polarization-conversion reflector; an input-coupler inputting the light of the second polarization into the waveguide; and an output-coupler outputting light propagating in the waveguide.

Abstract: A super-mode selective optical unit that may include (i) a multicore fiber (MCF) that comprises one or more claddings, and multiple doped fiber cores located within one of the one or more claddings; and (ii) a multimode fiber (MMF) that comprises a first MMF end and a second MMF end; wherein the first MMF end is configured to receive optical signals from the MCF; wherein the MMF is configured to attenuate in-phase super-mode components of the optical signals of the MCF and to amplify out-of-phase components of the optical signals.

Abstract: A method of preparing a preformed fiber optic circuit for later termination to at least one fiber optic connector includes providing a substrate for supporting a plurality of optical fibers, the substrate including at least one layer of flexible foil, wherein the flexible foil may be formed from polyethylene terephthalate (PET) according to one example and peeling a layer including at least the optical fibers from the at least one layer of flexible foil.

Abstract: Embodiments of the present application disclose a photonic chip, a LiDAR, and a mobile device. The photonic chip has a substrate, a cladding layer, a first coupler, a first beam splitter, an emitting waveguide module, and a first optical adjusting monitoring module. The first beam splitter includes a first port, a second port, a third port, and a fourth port. The first beam splitter is configured to output the optical signal input through the first port through the third port and the fourth port, and to output the optical signal input through the third port through the first port and the second port. The first optical adjusting monitoring module includes a first photodetector. Monitors the optical power of the return light received by the emitting waveguide module through the first optical adjusting monitoring module integrated on the photonic chip, making the process more time-saving and labor-saving.

Abstract: Extender ports comprising one or more connection ports with associated securing features and methods for making the same are disclosed. In one embodiment, the device comprises a shell, a first and second connection port, at least one securing feature passageway, and at least one securing feature. The first and second connection ports are disposed on the extender port and aligned for making an optical connection between external fiber optic connectors inserted into respective connection ports. The securing features are associated with the connection port passageway, and are suitable for retaining and releasing the external fiber optic connectors.

Abstract: An optical circuit board includes a wiring board and an optical waveguide located on a surface of the wiring board. The optical waveguide includes a lower cladding layer, a core, and an upper cladding layer disposed in this order from the wiring board. The lower cladding layer includes a first region including an opening portion, and a second region in which the core and the upper cladding layer are disposed in this order, the second region being adjacent to the first region. The core includes an exposed portion having the upper cladding layer not disposed in the first region. Furthermore, at least one supporting member is disposed in a circumference edge portion of the opening portion, in the first region of the lower cladding layer, and a difference between a height of the supporting member and a height of the exposed portion in the core is 5% or less.

Abstract: An optical mode coupler for mode coupling of waveguides. The optical mode coupler includes an oxide cladding layer, a waveguide channel formed on the oxide cladding layer, and a waveguide portion formed on the oxide cladding layer and partially enclosed by the waveguide channel on an end of the waveguide portion. The waveguide portion has a tapered region located on the end of the waveguide portion. The tapered region has a dual-plane tapering arrangement extending from the waveguide portion towards the waveguide channel for enhanced mode transformation efficiency.

Abstract: A sensor system includes a radiation source, an optical fiber, and a detection device. The radiation source is arranged to emit pulses of radiation. The optical fiber comprises a first end and a core. The first end is arranged to receive pulses of radiation output from the radiation source such that, in use, the pulses of radiation are coupled into the fiber. The core is arranged to support propagation of the pulses of radiation along the fiber. The core includes a plurality of reflectors each comprising a portion of the core having a refractive index which is different to the refractive index of adjacent regions of the core. Reflections of a pulse of radiation from adjacent reflectors output at the first end of the fiber are resolvable from each other in the time domain. The detection device is arranged to measure radiation output from the first end of the fiber and resolve radiation reflected at different locations in the core of the fiber.

Abstract: A demultiplexer for use in a wavelength division multiplexed system. The demultiplexer comprises: an input waveguide, configured to receive a wavelength division multiplexed signal; a demultiplexing element, configured to demultiplex the multiplexed signal received from the input waveguide into a plurality of multi-mode demultiplexed signal components; a multi-mode output waveguide, the multi-mode output waveguide being coupled to the demultiplexing element and configured to receive one of the multi-mode demultiplexed signal components; and a splitter, coupled to the multi-mode output waveguide, and configured to split the received multi-mode demultiplexed signal component into two single-mode outputs.