Abstract: Tapered core fibers are produced using tapered core rods that can be etched or ground so that a fiber cladding has a constant diameter. The tapered core can be an actively doped core, or a passive core. One or more sleeving tubes can be collapsed onto a tapered core rod and exterior portions of the collapsed sleeving tubes can be ground to provide a constant cladding diameter in a fiber drawn from the preform.

Abstract: A semiconductor optical device includes a substrate including first and second regions arranged in a first direction, a photodiode disposed on the first region, an optical waveguide disposed on the second region, and a buried layer disposed on a side surface of the photodiode. The side surface of the photodiode extends in the first direction. The photodiode has a first end surface intersecting with the first direction, and the optical waveguide is in direct contact with the first end surface. The buried layer is composed of a III-V compound semiconductor doped with a transition metal. The photodiode includes a stacked semiconductor layer including a first cladding layer, a light-absorbing layer and a second cladding layer stacked in that order on the substrate. The light-absorbing layer has a side surface having at least a portion recessed with respect to a side surface of the first cladding layer.

Abstract: A multicore fiber includes a plurality of cores and a cladding surrounding the plurality of cores. The plurality of cores is arranged and disposed on a linear line passed through the center of the cladding. A pair of cores is included. The pair of the cores is located adjacent to each other, and has different core diameters in a first direction in which the plurality of cores is arranged on the linear line. A ratio of a core diameter in the first direction to a core diameter in a second direction orthogonal to the first direction is different between the pair of the cores.

Abstract: A mount plate for an optical adaptor includes two bases bridged by a bar and a locking claw stemming out of each of the two bases. Each of the two bases has a folded structure erected at the back end of the base to fill up the gap between the optical adaptor and the hole of the panel and to reduce rattling. Supporting tips are provided at the base of the folded structure to support the folded structure and to keep the base securely attached to the optical adaptor.

Abstract: The present teachings are generally directed to devices and methods for triplet photons generations, and in particular to on-chip integrated sources for generating direct triplet entangled photons.

Abstract: A package for an arcuate planar lightwave circuit (PLC) chip includes a heater plate coupled to a base by a thick and soft support layer. The arcuate PLC is attached to the heater plate by soft adhesive. A hard adhesive is applied to a multi-waveguide end of the arcuate PLC, to additionally strengthen the attachment of the arcuate PLC to the heater plate. The structure allows the mechanical stress due to fiber pull/shock/vibration to be dissipated in the support layer without introducing large wavelength shifts in the arcuate PLC. The support layer also serves as a heat insulator, facilitating uniform heating of the arcuate PLC.

Abstract: A transparent waveguide for use in eye tracking includes an input-coupler and an output-coupler. The input-coupler comprises a plurality of curved grating lines having a radially varying pitch. When positioned in front of an eye illuminated with infrared light, infrared light beams reflected from the eye and incident on the input-coupler enter the waveguide at the input-coupler, propagate through the waveguide by way of total internal reflections, and exit the waveguide proximate the output-coupler.

Abstract: A connector is provided, including a connector body, a fastener and an elastomer. The fastener is pivoted on the connector body with a hook end and a press end positioned on both sides thereof, respectively. The two ends of the elastomer contact the connector body and the press end of the fastener, respectively. The connector of the invention may accomplish plugging and unplugging of an electronic equipment in a single hand press way without bracer arrangement by a configuration of the press end, and may maintain an engagement state between the hook end and the electronic equipment with an arrangement of the elastomer.

Abstract: A sensor comprising an optical fiber that includes a Bragg grating and a longitudinal-strain-inducing (LSI) jacket for inducing longitudinal strain into the optical fiber as a function of a transverse load, i.e., pressure or force. As the LSI jacket induces strain into the optical fiber, the fiber grating deforms, thereby changing the character of light reflected from the grating. The changes in character of the reflected light can be measured using suitable optical instrumentation. Additional physical characteristics that can be measured/sensed using an LSI-jacket-based sensor include moisture content/presence, chemical content/presence, and temperature. A transverse-load-sensing sensor can include transverse-load-applying structures that compress the LSI jacket under transverse load, causing the jacket to controllably elongate and thereby induce longitudinal strain into the optical fiber. Chemical and moisture LSI jackets can comprise materials that swell in the presence of the chemical or moisture.

Abstract: A Mach-Zehnder modulator includes: a conductive semiconductor region disposed on a substrate; a first waveguide arm disposed on the conductive semiconductor region; a second waveguide arm disposed on the conductive semiconductor region; a first electrode disposed on the first waveguide arm, the first electrode receiving a first drive signal applied to the first waveguide arm; a second electrode disposed on the second waveguide arm, the second electrode receiving a second drive signal applied to the second waveguide arm; a first ground electrode disposed on the conductive semiconductor region, the first ground electrode being electrically connected to a reference potential; and a second ground electrode disposed on the conductive semiconductor region. The first and second drive signals constitute a differential signal. The second ground electrode is electrically connected to the first ground electrode via the conductive semiconductor region.

Abstract: In a method of forming a liquid crystal display device, a black matrix is disposed on a substrate including a switching element formed thereon, a color filter is disposed on the switching element, a pixel electrode is electrically connected to the switching element, and a first alignment layer is disposed on the pixel electrode, to form a first substrate. A second substrate including a second alignment layer is formed. At least one of the first alignment layer and the second alignment layer includes a reactive mesogen. A liquid crystal layer is interposed between the first substrate and the second substrate. A light is irradiated onto the second substrate to provide pretilt angles of liquid crystal molecules of the liquid crystal layer.

Abstract: The present disclosure includes systems and apparatuses for an optical fiber management system. One embodiment of an optical fiber management system includes a cabinet comprising a system of building blocks that make up a rail-mounting system and an optical fiber management apparatus housed within one of the building blocks. The optical fiber management apparatus can comprise a housing, an adaptor plate resiliently connected to the housing, a splice tray, a housing cover, a radius limiter, and a base configured for integrated slack storage of at least one of buffer tube and ribbon cable.

Abstract: Techniques relating to optical shuffling are described herein. In an example, a system for shuffling a plurality of optical beams is described. The system includes a plurality of sources to output respective beams of light. The system further includes a plurality of receivers to receive respective beams of light. The system further includes a shuffling assembly including a plurality of sub-wavelength grating (SWG) sections. Each of the plurality of SWG sections is for defining optical paths of the plurality of beams. The plurality of SWG sections includes at least one reflecting SWG section to reflect and direct light from a respective one of the plurality of sources toward a respective one of the plurality of receivers.

Abstract: Bidirectional parallel optical transceiver modules for use in optical links and methods for communicating bidirectionally over the links are provided. The bidirectional parallel optical transceiver modules have features that ensure relatively low optical crosstalk, relatively low return loss and relatively high SNR. In addition, the modules have an in-line, zig-zag configuration that allows the modules to be compact and to have high bidirectional channel density for achieving high bandwidth.

Abstract: A signal transfer link includes a first plasmonic coupler, and a second plasmonic coupler spaced apart from the first plasmonic coupler to form a gap. An insulator layer is formed over end portions of the first and second plasmonic couplers and in and over the gap. A plasmonic conductive layer is formed over the gap on the insulator layer to excite plasmons to provide signal transmission between the first and second plasmonic couplers.

Abstract: A system for grating couplers incorporating perturbed waveguides is disclosed and may include, in a semiconductor photonics die, communicating optical signals into and/or out of said semiconductor die utilizing a grating coupler on the semiconductor photonics die, where the grating coupler includes perturbed waveguides as scattering elements, and the perturbed waveguides comprise rows of continuous waveguides defined by non-discrete scatterers. The perturbed waveguides may include a variable width along a length of the perturbed waveguides. The grating coupler may include a single polarization grating coupler comprising perturbed waveguides and a non-perturbed grating, or a polarization splitting grating coupler including two sets of rows of perturbed waveguides at a non-zero angle from each other.

Abstract: Embodiments of the present disclosure are directed toward techniques and configurations for an apparatus with an optical connector. In one embodiment, the apparatus may include an optical connector having a cage to receive an optical fiber cable to connect the apparatus with another apparatus. The cage may include first and second sides and a face that mates the first and second sides. The face may comprise an optical interface to optically connect tips of the optical fiber cable and the other apparatus. The cage may further include a cavity having a first portion formed substantially in the face to receive the optical interface, and a second portion that extends into one of the first or second sides to provide an opening to enable application of an adhesive material to the tips of the cable, to fixably connect the tips with the optical interface. Other embodiments may be described and/or claimed.

Abstract: An optical connector for terminating an optical fiber comprises a housing configured to mate with a receptacle and a collar body disposed in the housing. The collar body includes a ferrule securely disposed in an opening of the collar body, the ferrule including a housing portion to receive a gripping device to grip an optical fiber. A backbone retains the collar body within the housing and includes a fiber jacket clamping portion to clamp a jacket portion of the optical fiber. A boot is attachable to a portion of the backbone, wherein the boot actuates the fiber jacket clamping portion of the backbone upon attachment of the boot to the backbone.

Abstract: Optical filters comprising one or more optically-coupled Fabry-Perot resonators are disclosed. In some embodiments, the one or more optically coupled Fabry-Perot resonators include a graded index fiber. In some embodiments, the one or more optically coupled Fabry-Perot resonators are coupled end-to-end, whereas in other embodiments the one or more optically coupled Fabry-Perot resonators are side-coupled through evanescence. One or more implementations of an optical filter allow a spectral response of an input light beam to be controlled, through various approaches, e.g., by exposing a component fiber to ultra-violet radiation.

Abstract: An HOM-based optical fiber amplifier is selectively doped within its core region to minimize the presence of dopants in those portions of the core where the unwanted lower-order modes (particularly, the fundamental mode) of the signal reside. The reduction (elimination) of the gain medium from these portions of the core minimizes (perhaps to the point of elimination) limits the amount of amplification impressed upon the backward-propagating Stokes wave. This minimization of amplification will, in turn, lead to a reduction in the growth of the Stokes power that is generated by the Brillouin gain, which results in increasing the amount of power present in the desired, forward-propagating HOM amplified optical signal output.