Abstract: A photonic integrated circuit is provided that may include a substrate; one or more optical sources, on the substrate, to output light associated with a corresponding one or more optical signals; one or more waveguides connected to the one or more optical sources; a multiplexer connected to the one or more waveguides; and one or more light absorptive structures, located on the substrate adjacent to one of the one or more optical sources, one of the one or more waveguides, and/or the multiplexer, to absorb a portion of the light associated with at least one of the corresponding one or more optical signals.

Abstract: An enclosure for connecting a subscriber to a fiber optic network includes a rotatable cable spool disposed within a main housing. A connectorized end of a subscriber cable is routed into the main housing and plugged into an adapter disposed within the enclosure. A cover of the enclosure is closed after the subscriber cable is plugged into the adapter. Prior to connecting the subscriber cable to the adapter, an optical cable can be paid out from the cable spool. One end of the optical cable rotates in unison with the cable spool while the other end is pulled from the enclosure.

Abstract: Certain types of aggregation enclosures include cable input ports and downwardly angled cable output ports. A cover is pivotally coupled to the body so that the cover moves between an open position and a closed position. A modular component panel may be disposed within the enclosure. The component panel includes one or more distribution components (e.g., fiber distribution components or power distribution components) configured to connect at least a portion of an incoming cable to at least a portion of an outgoing cable.

Abstract: Provided are an optical modulation device, a method of operating the optical modulation device, and an apparatus including the optical modulation device. The optical modulation device may include a mirror array including a plurality of mirror elements, a nano-antenna array including a plurality of nano-antennas, and an active layer disposed between the mirror array and the nano-antenna array. At least some of the plurality of mirror elements may have different refractive indices. The at least some of the plurality of mirror elements may include different materials, include different dopants, or have different doping concentrations.

Abstract: A microwave photonic filter is provided. The filter includes an optical source, an electro-optic modulator, a single mode optical fiber, a few-mode optical fiber, and a photodiode. The electro-optic modulator is configured to receive an optical carrier from the optical source and an input electrical signal. The electro-optic modulator modulates the optical carrier based on the input electrical signal. The single mode optical fiber is configured to receive the modulated optical carrier from the electro-optic modulator. The few-mode optical fiber is configured to receive the modulated optical carrier from the single mode optical fiber. The filter includes one of a plurality of methods for causing higher order mode excitation in the few-mode fiber. The photodiode is configured to receive an output from the few-mode optical fiber.

Abstract: An optical waveguide includes: a plurality of linear portions arranged in parallel to each other; a plurality of arcuate portions, in the folded portion of the optical waveguide, concentrically arranged about a predetermined center position as a center on the substrate at intervals narrower than intervals between the plurality of linear portions, each of the arcuate portions having a central angle that increases as each of the arcuate portions is closer to the center position; and a plurality of connecting portions respectively connecting the plurality of linear portions and the plurality of arcuate portions, at least one group of the connecting portions bending in a direction opposite to a direction where each of the arcuate portions bends.

Abstract: Bi-directional data center architectures employing a jacketless trunk cable are disclosed. The bi-directional data center architecture includes first and second coupling panels respectively having first adapters and second adapters. The architecture also includes a plurality of sub-racks having sub-rack adapters, and a jacketless trunk cable that includes a plurality of sub-unit sections, with each sub-unit section carrying one or more optical fibers. The plurality of sub-unit sections are configured to optically connect corresponding first and second adapters of the first and second coupling panels to the sub-rack adapters such that every optical fiber in each sub-unit section is used to establish an optical connection.

Abstract: A fiber optic ferrule includes a body extending from a first end to a second opposite end, with the body including an axial passage extending between the first and the second ends. The axial passage includes a first diameter portion having a diameter of at least 125 microns, a second diameter portion having a diameter of at least 250 microns and less than a diameter of a buffer, and a smooth and continuous transition between the first and the second diameter portions. The second diameter portion is positioned between the first diameter portion and the second end. The axial passage further defines a tapered shape at the second end extending inward from the second end toward the second diameter portion. In certain embodiments, another smooth and continuous transition can be provided between the taper shape and the second diameter portion. In certain embodiments, the axial passage is smooth and continuous between the first and the second ends of the body. A hub holds the ferrule.

Abstract: A paired simplex fiber optic connector assembly comprises a clip that holds two simplex LC connectors together to yield a duplex connector that can be plugged into a duplex adapter. In some embodiments, the two simplex connectors are held in place by rails formed on both sides of the clip. In other embodiments, a side arm is formed on each side of the clip, the side arm comprising a hub that extends from the clip and a non-circular flange formed on the end of the hub. The flange is configured to engage with channels formed on the sides of the simplex connectors, thereby holding the simplex connectors in place. The simplex connectors are attached to the clip by rotating the connectors about the flange, thereby engaging the channels with the flanges.

Abstract: A device for coupling electromagnetic waves into a chip or the like, including a cavity for accommodating a light source, an opening for the passage of light of the light source, which is connected to the cavity, the device including a first surface and a second surface situated opposite the first surface, at least one of the two surfaces including at least two first surface sections, which are inclined relative to one another at an inclination angle, and the distance between the first surface and the second surface being different on different sides of the cavity and/or of the opening, and surface areas on different sides of the cavity and/or opening respectively adjacent thereto having the identical inclination angle.

Abstract: In various embodiments, a beam-parameter adjustment system and focusing system alters a spatial power distribution of a radiation beams before the beam is coupled into an optical fiber or delivered to a workpiece.

Abstract: An optical circuit board which is mounted with a loop-back circuit for returning aligning light to the fiber array in the vicinity of the fiber array connection end. Since an aligning loop-back circuit can be formed in an optical waveguide pattern, a production cost does not increase in comparison to an optical circuit board of the related art. The aligning light combined from the optical fiber to the aligning port of the optical circuit board is returned to the optical fiber around the loop-back circuit. Therefore, it is possible to perform alignment using the returned light. That is, alignment can be performed while being mounted on a package without installing a light-reflecting film or mirror.

Abstract: Techniques are provided for single edge coupling of chips with integrated waveguides. For example, a package structure includes a first chip with a first critical edge, and a second chip with a second critical edge. The first and second chips include integrated waveguides with end portions that terminate on the first and second critical edges. The second chip includes a signal reflection structure that is configured to reflect an optical signal propagating in one or more of the integrated waveguides of the second chip. The first and second chips are edge-coupled at the first and second critical edges such that the end portions of the integrated waveguides of the first and second chips are aligned to each other, and wherein all signal input/output between the first and second chips occurs at the single edge-coupled interface.

Abstract: Techniques are provided for single edge coupling of chips with integrated waveguides. For example, a package structure includes a first chip with a first critical edge, and a second chip with a second critical edge. The first and second chips include integrated waveguides with end portions that terminate on the first and second critical edges. The second chip includes a signal reflection structure that is configured to reflect an optical signal propagating in one or more of the integrated waveguides of the second chip. The first and second chips are edge-coupled at the first and second critical edges such that the end portions of the integrated waveguides of the first and second chips are aligned to each other, and wherein all signal input/output between the first and second chips occurs at the single edge-coupled interface.

Abstract: An electro-optic beam controller, material processing apparatus, or optical amplifier, and corresponding methods, can include an actively controlled, waveguide-based, optical spatial mode conversion device. The conversion device can include a coupler, which can be a photonic lantern, configured to combine light beams into a common light beam; a sensor configured to measure at least one characteristic of the common light beam; and a controller configured to modulate optical parameters of the individual, respective light beams to set one or more spatial modes of the common light beam. Actively controlled and modulated devices can be used to maintain a stable, diffraction-limited beam for use in an amplification, communications, imaging, laser radar, switching, or laser material processing system. Embodiments can also be used to maintain a fundamental or other spatial mode in an optical fiber even while scaling to kilowatt power.

Abstract: A fiber optic enclosure assembly includes a housing having an interior region and a bearing mount disposed in the interior region of the housing. A cable spool is connectedly engaged with the bearing mount such that the cable spool selectively rotates within the housing. A termination module disposed on the cable spool so that the termination module rotates in unison with the cable spool. A method of paying out a fiber optic cable from a fiber optic enclosure includes rotating a cable spool, which has a subscriber cable coiled around a spooling portion of the cable spool, about an axis of a housing of the fiber optic enclosure until a desired length of subscriber cable is paid out. A termination module is disposed on the cable spool.

Abstract: Aspects and techniques of the present disclosure relates generally to incorporating an index matching gel within a HMFOC such that as the HMFOC is mated, fiber tips protruding from multi-fiber ferrules of the HMFOC pass through the indexing matching gel to remove contaminates therefrom. The present disclosure also relates to a method of removing contaminates from optical fibers upon mating a hardened multi-fiber optical connector (HMFOC) with another HMFOC.

Abstract: A system for connecting a fiber optic connector to a fiber optic adapter includes various alternative improvements, including improvements to the shutter, the alignment device, and the adapter in general.

Abstract: Provided is an optical waveguide with an inscribed Bragg grating, where the Bragg grating is stable at high temperature, has low scattering loss and high reflectivity. Also provided is a method for inscribing a Bragg grating in an optical waveguide, the method comprising irradiating the optical waveguide with electromagnetic radiation from an ultrashort pulse duration laser of sufficient intensity to cause a permanent change in an index of refraction within a core of the optical waveguide, where the irradiating step is terminated prior to erasure of a Bragg resonance, and heating the optical waveguide to a temperature and for a duration sufficient to substantially remove a non-permanent grating formed in the optical waveguide by the irradiating step.

Abstract: Various embodiments of a photonic integrated circuit (PIC) are described herein. A PIC, functioning as a coherent receiver, may include optical components such as an optical coupler, a directional coupler, a beam splitter, a polarizing beam rotator-splitter, a variable optical attenuator, a monitor photodiode, 90-degree hybrid mixer, and a waveguide photodiode. The PIC may also include electrical components such as an electrode, a capacitor, a resistor and a Zener diode.