Abstract: The present disclosure relates to a hybrid cable having a jacket with a central portion positioned between left and right portions. The central portion contains at least one optical fiber and the left and right portions contain electrical conductors. The left and right portions can be manually torn from the central portion.

Abstract: A rectangular optical waveguide, an optical phase shifter and an optical modulator each formed of a semiconductor layer are formed on an insulating film constituting an SOI wafer, and then a rear insulating film formed on a rear surface of the SOI wafer is removed. Moreover, a plurality of trenches each having a first depth from an upper surface of the insulating film are formed at a position not overlapping with the rectangular optical waveguide, the optical phase shifter and the optical modulator when seen in a plan view in the insulating film. As a result, since an electric charge can be easily released from the SOI wafer even when the SOI wafer is later mounted on the electrostatic chuck included in the semiconductor manufacturing apparatus, the electric charge is less likely to be accumulated on the rear surface of the SOI wafer.

Abstract: One embodiment is directed to a compact system for scanning electromagnetic imaging radiation, comprising a first waveguide and a second waveguide, each of which is operatively coupled to at least one electromagnetic radiation source and configured such that output from the first and second waveguides is luminance modulated and scanned along one or more axes to form at least a portion of an image.

Abstract: Systems, methods and devices are provided for calibrating a flexible implement that employs fiber Bragg gratings (FBGs) for shape sensing. In some embodiments, methods and devices are provided for determining the longitudinal location of a FBG within an optical fiber that is employed for shape sensing. In other embodiments, methods and devices are employed for the determination of calibration parameters that relate the measured wavelength shift of a set of FBGs to the curvature at the location within the flexible implement where the set of FBGs resides. Various calibration devices are disclosed that employ guiding features for bending the flexible portion of the flexible implement along known curved profiles. In some embodiments, keyed features are incorporated into the flexible implement and the calibration device, such that the flexible implement is inserted into the device in a known orientation. In some embodiments, the flexible implement may incorporate a strain isolation mechanism.

Abstract: The disclosed systems for multiple data center building optical communication may include (1) a first optical switching node of a first main point of entry (MPOE) of a first data center building that communicatively couples a first fiber pair of a first long-haul path to a computing system of the first building, (2) a second optical switching node of the first MPOE of the first building that communicatively couples a first fiber pair of a second long-haul path to the computing system of the first building, and (3) a third optical switching node of the first MPOE of the first building that communicatively couples the first and second optical switching nodes of the first MPOE of the first building to a second MPOE of the first building and a first MPOE of a second data center building. Various other systems and methods are also disclosed.

Abstract: A single-mode fiber with low loss and low bend loss is disclosed. The fiber is single mode and has a central core (10), an inner cladding (20) and an outer cladding (30). The central core (10) has a radius r1 and relative refractive index with a maximum value of ?1max and a core alpha greater than 1 and less than 10, and a Ge02 dopant concentration of greater than 1 wt. % and less than or equal to 5 wt. %. The inner cladding (20) has an outer radius r2>9 micrometers and a relative refractive index ?2 where ?2 is less then ?0.15%. The outer cladding (30) has a refractive index ?3, wherein ?1>?3>?2. The difference ?3??2>0.005%. The inner cladding includes fluorine having a concentration of greater than or equal to 0.5 wt. % and the outer cladding is updoped with respect to inner cladding.

Abstract: Preform for an optical waveguide containing a core with a non-circular geometry and at least one cladding layer, in which the dopand concentration of the cladding layer is increased compared to the dopand concentration of a preform with circular core geometry and identical NA. A method for the production of a preform for an optical fiber is provided. An optical waveguide with a nominal dopand concentration of c(eff)×F?c(nom) in at least one cladding layer is also provided.

Abstract: The invention relates to a method of manufacturing an active optical fiber having a cladding and a doped core, as well as the active optical fiber equipped with the cladding and the doped core. The active optical fiber according to the invention is adapted to conduct and generate radiation having a wavelength ? and is provided with a cladding and a core containing at least one active dopant, characterized in that the core comprises elongate elements made of a first type of glass having a first refractive index n1 and elongate elements of a second type of glass having a second refractive index n2, oriented along the optical fiber and forming a compact bundle, wherein transverse dimensions of the elongate core elements are smaller than ? of the wavelength ?. Such optical fibers are used in laser generation and in amplification techniques.

Abstract: An optical Mach Zehnder modulator is described. The optical Mach Zehnder modulator may comprise a plurality of segments separated by curved waveguides. For example, an optical Mach Zehnder modulator may comprise a first waveguide arm having a first pn-junction formed therein, a second waveguide arm having a second pn-junction formed therein, a third waveguide arm coupled to the first waveguide arm via a first curved waveguide and a fourth waveguide arm coupled to the second waveguide arm via a second curved waveguide. The segments may have the same polarities. Alternatively, the segments may have opposite polarities. The different segments may be driven using different RF signals. The RF signals may be delayed from one another.

Abstract: A multi-purpose optical fiber with coating is provided. The optical fiber can function as a transmission fiber or as a coupling fiber for optical data links that features low coupling loss to silicon photonics lasers, VCSELs, single mode transmission fibers, multimode transmission fibers, and high speed receivers. The fiber includes a core, an optional inner cladding region, a depressed index cladding region, an outer cladding region, and a coating. The relative refractive index profile of the coupling fiber includes a small-radius core region with ? profile and a depressed index cladding region that facilitates low bending loss and high bandwidth. The coating thickness and overall diameter of the fiber is small.

Abstract: Connectors and a duplex clip for forming duplex connector assemblies are provided herein. The connector includes a rigid latch member for positive locking with another component, such as an adaptor. The duplex clip is configured to hold two connectors to form a duplex connector assembly.

Abstract: A semiconductor structure includes a dielectric waveguide, a driver die, a first transmission electrode, a second transmission electrode, and a receiver die. The driver die is configured to generate a driving signal. The first transmission electrode is located along a first side of the dielectric waveguide and configured to receive the driving signal. The second transmission electrode is located along a second side of the dielectric waveguide and electrically coupled to a transmission ground. The first transmission electrode and the second transmission electrode are mirror images. The receiver die is configured to receive a received signal from the dielectric waveguide.

Abstract: At least one optical fiber of a fiber sensor has sensing parts whose number is number of the anticipated inflection points+one or more, the anticipated inflection points being inflection points of a shape of a detection target range of a detection target. The number of the anticipated inflection points is decided based on one of a functional limit and a structural limit which limit a degree of freedom in a bending shape of the detection target. A space L1 between the anticipated inflection points is L1=r1·?1, wherein r1 is a curvature radius at a maximum bending of the detection target range of the detection target, ?1 is a central angle of an arc created by the space between the anticipated inflection points at the maximum bending, and ?1??/2.

Abstract: An silicon photonics device of hybrid waveguides having a coupling interlayer with an accurately controlled thickness and a method of making the same. The device includes a first plurality of Si waveguides formed in a SOI substrate and a first layer of SiO2 overlying the first plurality of Si waveguides and a second plurality of Si3N4 waveguides formed on the first layer of SiO2. At least one Si3N4 waveguide is disposed partially overlapping with at least one of the first plurality Si waveguides in vertical direction separated by the first layer of SiO2 with a thickness controlled no greater than 90 nm. The device includes a second layer of SiO2 overlying the second plurality of Si3N4 waveguides. The method of accurately controlling the coupling interlayer SiO2 thickness includes a multilayer SiO2/Si3N4/SiO2 hard mask process for SiO2 etching and polishing as stopping and buffering layer as well as Si waveguide etching mask.

Abstract: Waveguide connectors include a ferrule having first alignment features. A waveguide has one or more a topclad portions, each with a waveguide core, second alignment features fastened to the first alignment features, and underclad portion that is thicker than the one or more topclad portions.

Abstract: A cable spool includes first and second curved flanges extending radially outwardly from first and second axial ends of a drum. The flanges have outer edges that cooperate to define an annular slot providing access to a passageway surrounding the drum. The slot has a width that is less than half the height of the drum. A cable is wrapped around the drum. A closure having an environmentally sealed interior may receive an end of the cable. A second cable can be deployed from a second spool and coupled to the end of the cable within the closure. The second spool can be mounted with the cable spool. A cover can be placed over the spools for aesthetic or protection reasons.

Abstract: A monolithically integrated optical device. The device has a gallium and nitrogen containing substrate member having a surface region configured on either a non-polar or semi-polar orientation. The device also has a first waveguide structure configured in a first direction overlying a first portion of the surface region. The device also has a second waveguide structure integrally configured with the first waveguide structure. The first direction is substantially perpendicular to the second direction.

Abstract: The optical waveguide element has a first optical waveguide core; and a second optical waveguide core. In the optical waveguide element, the first optical waveguide core includes a first coupling portion configured to propagate any one polarized wave of a TE polarized wave and a TM polarized wave of a kth-order mode, the other polarized wave of an hth-order mode, and the other polarized wave of a pth-order mode, and a first Bragg reflector connected to the first coupling portion. The second optical waveguide core includes a second coupling portion.

Abstract: One example includes an optical port-shuffling module. The module includes a plurality of inputs to receive a respective plurality of optical signals. The module also includes a plurality of outputs to provide the respective plurality of optical signals from the optical port-shuffling module. The module further includes a plurality of total-internal-reflection (TIR) mirrors arranged in optical paths of at least a portion of the plurality of optical signals to reflect the at least a portion of the plurality of optical signals to at least a portion of the plurality of outputs to shuffle the plurality of optical signals between the plurality of inputs and the plurality of outputs.

Abstract: In various embodiments, the beam parameter product and/or numerical aperture of a laser beam is adjusted utilizing a step-clad optical fiber having a central core, a first cladding, an annular core, and a second cladding.