Abstract: A piezoelectric ceramic that includes barium titanate and 0.04 mass % or more and 0.20 mass % or less manganese relative to barium titanate. The piezoelectric ceramic is composed of crystal grains. The crystal grains include crystal grains A having an equivalent circular diameter of 30 ?m or more and 300 ?m or less and crystal grains B having an equivalent circular diameter of 0.5 ?m or more and 3 ?m or less. The crystal grains A and the crystal grains B individually form aggregates and the aggregates of the crystal grains A and the aggregates of the crystal grains B form a sea-island structure.

Abstract: A pressure-balanced enclosure for subsea use, and in particular for use as a submersible junction box in which subsea cables can be joined. The apparatus maintains a balanced pressure within the termination chamber; it is field installable, testable, and repairable. The termination chamber is not oil-filled; instead, it is substantially filled with a solid particulate fill material which includes a portion of elastomeric material.

Abstract: The invention prevents inconveniences from being caused by ejection failure and unintended mixing of different colors. To this end, the invention performs preliminary ejection of ink after a wiping action to sweep mist adhering to a face of a printing head, in which an ejection opening is formed. Moreover, the amount of ink to be wastefully consumed by the preliminary ejection after the wiping is reduced. To this end, the number of preliminary ejections is regulated. The degree of adherence of mist to the ejection-opening-formed face depends on the amount of printing (the number of printed sheets, the number of ink ejections for printing, or the like). So, at the time of the preliminary ejection after the wiping, the number of ink ejections in the preliminary ejection is regulated in accordance with the amount of printing that has been done since the last wiping action.

Abstract: Semiconductor devices having an optical transceiver include a cladding on a substrate, a protrusion vertically extending trough the cladding and materially in continuity with the substrate, and a coupler on the cladding and the protrusion.

Abstract: Methods for the fabrication of orientation-patterned semiconductor structures are provided. The structures are light-waveguiding structures for nonlinear frequency conversion. The structures are periodically poled semiconductor heterostructures comprising a series of material domains disposed in a periodically alternating arrangement along the optical propagation axis of the waveguide. The methods of fabricating the orientation-patterned structures utilize a series of surface planarization steps at intermediate stages of the heterostructure growth process to provide interlayer interfaces having extremely low roughnesses.

Abstract: Disclosed in one example embodiment is a method for fabricating a reinforced multi-body optical device. One method involves applying a coating to sides of an interior plate and bonding two plates to either side of the interior plate. The bonded plates are diced at an angle that is not orthogonal to the bonded plates. The top and bottom portions of a diced section are removed to form a multi-body polarization beam splitter (PBS) having a generally rectangular perimeter. A supporting plate is bonded to the multi-body PBS to form a reinforced multi-body PBS, wherein the supporting plate has a CTE that is within about 0.5 parts per million of the CTE of the multi-body PBS. The multi-body PBS is grinded to reduce the thickness of the multi-body PBS.

Abstract: An optical fiber cable, includes at least one optical fiber and a cable connector at a cable end, and a removable cap removably couplable to a free end of the cable connector. The cap includes a recess adapted to receive and accommodate an anchor element of a cable pulling rope, and to retain the anchor element against traction when the pulling rope is tractioned.

Abstract: A semiconductor laser module includes a laser diode array, an optical fiber array, a fiber array fitting for fixing the optical fiber array, a casing, and a support fitting for fixing the fiber array fitting and casing. The fiber array fitting and support fitting have a first contact section that is in line-contact or surface-contact with the plane section parallel with the light emission surface of the laser diode array, and are laser-welded and fixed to each other at the first contact section. The support fitting and casing have a second contact section that is in line-contact or surface-contact with the plane section vertical to the light emission surface of the laser diode array, and are laser-welded and fixed to each other at the second contact section.

Abstract: A driving circuit includes a reference voltage generating circuit and a driver circuit. The driver circuit drives a driven element at a level determined by the reference voltage output by the reference voltage generating circuit. The reference voltage generating circuit includes a regulating section that generates a regulated voltage, a temperature compensation section that applies a temperature compensation to the regulated voltage to compensate for the temperature characteristics of the driven element, and a voltage amplifying section that amplifies the resulting temperature compensated voltage to generate the reference voltage, thereby supplying a reference voltage high enough to avoid noise effects.

Abstract: A multi-electrode system includes a fiber holder that holds at least one optical fiber, a plurality of electrodes arranged to generate a heated field to heat the at least one optical fiber, and a vibration mechanism that causes at least one of the electrodes from the plurality of electrodes to vibrate. The electrodes can be disposed in at least a partial vacuum. The system can be used for processing many types of fibers, such processing including, as examples, stripping, splicing, annealing, tapering, and so on. Corresponding fiber processing methods are also provided.

Abstract: A method of manufacturing an optical waveguide, includes forming a first light path core layer having a first light path length on a first cladding layer, forming a groove portion having an inclined surface in an end side of the first light path core layer, forming a second light path core layer having a second light path length which is longer than the first light path length, in a lateral area of the first light path core layer, forming a groove portion having an inclined surface, arranged to an outer side than the groove portion of the first light path core layer, in an end side of the second light path core layer, forming partially a metal layer on the respective inclined surfaces of the first and second light path core layer, and forming a second cladding layer covering the first and second light path core layer.

Abstract: A hole-assisted optical fiber includes a core portion and a cladding portion that includes an inner cladding layer, an outer cladding layer, and holes formed around the core portion. A diameter of the core portion is 3 ?m to 9.8 ?m, a relative refractive index difference of the core portion relative to the outer cladding layer is 0.11% to 0.45%, an outside diameter of the inner cladding layer is 53 ?m or less, a relative refractive index difference of the inner cladding layer relative to the outer cladding layer is a negative value, ?0.30% or more, a diameter of each hole is 2.4 ?m to 4.0 ?m, a hole occupancy rate is 17% to 48%, a bending loss at a wavelength of 1625 nm when bent at a radius of 5 mm is 1 dB/turn or less, and a cut-off wavelength is 1550 nm or less.

Abstract: Fiber optic connectors and adapters may be automatically secured and released via a management system. Such automation may inhibit accidental and/or unauthorized insertion of fiber optic connectors into adapter ports. The automation also may inhibit accidental and/or unauthorized removal of the fiber optic connectors from the adapter ports.

Abstract: Fiber optic housings configured to accommodate fiber optic modules/cassettes and fiber optic panels are disclosed. In one embodiment, a fiber optic apparatus is provided and comprised of a fiber optic housing and one or more removable panel clips. Each of the one or more removable panel clips includes at least one receptacle configured to receive an insert of a fiber optic panel to support the fiber optic panel in the fiber optic housing. In another embodiment, a fiber optic shelf configured to be supported in a fiber optic housing is provided. The fiber optic shelf comprises a mounting surface and one or more removable panel clips attached to the mounting surface that each includes at least one receptacle configured to receive an insert of a fiber optic panel to support the fiber optic panel in the mounting surface. Related components and methods are also disclosed.

Abstract: An optical-electrical conversion module includes a circuit board, a planar optical waveguide formed on the circuit board, two first lenses and two second lenses mounted above the planar optical waveguide, a base plate electrically connected to the circuit board, and an optical signal emitting member and an optical signal receiving member mounted on the base plate. The planar optical waveguide forms two inclined surfaces. The base plate is positioned above the second lenses. Optical signals are reflected by the inclined surface, and are transmitted to the optical signal receiving member. The optical signal receiving member converts the optical signals to electrical signals to transmit to the circuit board. Electrical signals of the circuit board are converted to optical signals via the optical signal emitting member, and then are transmitted to the planar optical waveguide. The present disclosure further provides an optical transmission connecting assembly using the optical-electrical conversion module.

Abstract: An optical waveguide device module is provided, wherein a control electrode includes a signal electrode and ground electrodes disposed to sandwich the signal electrode, a connection substrate is provided with a signal line and ground lines disposed to sandwich the signal line, the distance W1 between the ground electrodes in the input end or the output end of the control electrode is larger than the distance W2 between the ground lines on the optical waveguide device side of the connection substrate, the control electrode has a portion of which the distance between the ground electrodes is smaller than the distance W2 in a portion away from the input end or the output end thereof, and interconnections of which the distance W between ground interconnections connecting the optical waveguide device and the connection substrate is at least smaller than the distance W1.

Abstract: Cables have reduced freespace, reduced tube diameters, and reduced strength member diameters. The cables are designed to pass robustness testing such as GR-20 while using smaller amounts of raw materials to produce.

Abstract: An optical assembly, which is in particular in the form of a splitter component with a so-called splitter forming a passive optical component, is produced particularly inexpensively. In a first step a plurality of splitters are produced on a common wafer by forming a corresponding conductor track pattern. In a second step optical fibers are coupled simultaneously to the connection sides of the individual splitters with the aid of a connection carrier. Then, in a third step the individual splitters with the connection carriers connected thereto are separated form one another. Only one common coupling operation for a large number of splitters is required. The splitters may then be connected to form a splitter cascade.

Abstract: An integrated circuitry structure includes at least first and second regions. An optical layer includes optical waveguides. A heat-conductive material transfers heat from at least the second region through the optical layer to a heat sink.

Abstract: An optical fiber connector includes a body, a photoelectric conversion module received in the body, a receiving member, and two L-shaped optical fibers. The photoelectric conversion module includes a base, a light emitting unit, and a light receiving unit. The light emitting unit and the light receiving unit are mounted on the base. The receiving member is disposed over the light emitting unit and the light receiving unit and defines two L-shaped receiving holes. The optical fibers are received in the respective receiving holes. One end of one of the two optical fibers is optically aligned and coupled with the light emitting unit. One end of the other optical fiber is optically aligned and coupled with the light receiving unit.