Abstract:
The present invention is generally directed to luminescent lanthanide compounds with phosphine oxide, phosphine oxide-sulfide, pyridine N-oxide, and phosphine oxide-pyridine N-oxide ligands. It also relates to electronic devices in which the active layer includes a lanthanide complex.
Abstract:
The present invention is generally directed to luminescent lanthanide compounds with phosphine oxide, phosphine oxide-sulfide, pyridine N-oxide, and phosphine oxide-pyridine N-oxide ligands. It also relates to electronic devices in which the active layer includes a lanthanide complex.
Abstract:
The present invention is generally directed to luminescent lanthanide compounds with phosphine oxide, phosphine oxide-sulfide, pyridine N-oxide, and phosphine oxide-pyridine N-oxide ligands. It also relates to electronic devices in which the active layer includes a lanthanide complex.
Abstract:
An apparatus and method for forming a Bragg grating on an optical fiber using a phase mask to diffract a beam of coherent energy and a lens combined with a pair of mirrors to produce two symmetrical virtual point sources of coherent energy in the plane of the optical fiber. The two virtual light sources produce an interference pattern along the optical fiber. In a further embodiment, the period of the pattern and therefore the Bragg wavelength grating applied to the fiber is varied with the position of the optical fiber relative the lens.
Abstract:
A double cladding fiber includes an inner core doped with active species, an inner cladding disposed adjacent said inner core for receiving pumping energy, minimizing local modes in said inner cladding, and transferring said pumping energy to the core. An outer cladding is disposed adjacent the inner cladding. The cross section of said inner cladding has a polygon-like shape with its boundary being a plurality of well-defined arcs, each of the arcs having substantially different arc center for delivering energy with maximum efficiency to the inner core meeting the limitation of: (1−L/r1)(1−L/r2) 1; where r1 and r2 is the arc radius of the inner cladding surfaces that are opposite to each other (mirror pair), with the radius of a concave mirror being positive and that of a convex mirror being negative, L is the distance between two mirrors.
Abstract:
Polymers are produced using transition metal complexes that have sites capable of binding a Lewis acid in close proximity to the metal center.
Abstract:
Olefins, such as ethylene, are polymerized using as a polymerization catalyst a complex of a selected transition metal with a monoanionic ligand that has at least three atoms that may coordinate to the transition metal. Also disclosed are the above selected transition metal complexes, and intermediates thereto.
Abstract:
An electronic control module 100 is provided wherein a power device 102 is secured to a rigidizer, or heat spreader, 110 such that a thermally conductive path is created for a conduction of heat from the power device to the rigidizer. A thermally conductive and electrically insulated interface 208, preferably anodized aluminum, is disposed between device 102 and rigidizer 110 and is solder bonded to each of the device and the rigidizer, facilitating the creation of a thermal path from the device to the rigidizer. In order to solder bond the device to the interface and the interface to the rigidizer, solderable coatings 206, 210, 214 are respectively applied to the surfaces 207 and 209 of the interface and surface 215 of the rigidizer.
Abstract:
Titanium oxide particles are prepared from the reaction of an aqueous basic solution with (1) an aqueous acidic titanium salt solution, or (2) an aqueous salt solution of a titanium salt and an aqueous salt solution of a dopant metal salt. In preferred embodiments, the particles may range in size from 0.1 to 10 microns (10-6 meters), and possess relatively high bulk density combined with high surface area.