320 results about "Active medium" patented technology

A system and a method manage, control and / or render media in a network. The system utilizes a media management application that manages, controls and / or renders digital media files in the network. A user browses, searches, manages and / or consumes content from multiple storage devices and servers in the network. The user may view a visual representation of active media connections between the available servers and / or the available rendering devices connected to the network.

Methods for fabricating a stent using a femtosecond laser with an Ytterbium Tungstate active medium are disclosed. In some embodiments, a method includes forming a pattern in the substrate with the laser, the pattern including a plurality of structural elements.

Systems and methodologies are provided for activating a polymer memory cell(s) after production by subjecting the polymer memory cell to an electrical field, for an initialization thereof. Such initialization can facilitate the distribution and mobility of metal ions (or charged metallic molecules) within an active layer of the polymer memory cell. The memory cell can include various layers of alternating passive and active media, which are sandwiched between conducting electrode layers.

Streaming media network parameters are measured using an electronic system and displayed directly to a user or transmitted via an electronic interface such as an existing system network conduit, either in or out-of-band. A scalable hardware and / or software compute engine filters and reduces network parameters to simplify tracking the instantaneous and long term streaming media performance of the network. Hence, the entire set of active media streams is continuously monitored concurrently, thereby providing the ability to detect impairments as well as predict impending impairments. In one example, an existing packetized network conduit containing streaming media is tapped to concurrently and objectively analyze the streaming media streams, producing statistics (such as delay factor and media loss rate) and alarm-type events according to predetermined rules. Tapping the existing packetized network in multiple points provides comparison points and assists in pinpointing the source(s) of the impairment(s).

An optical fiber is disclosed that can be used as an active medium in fiber lasers and / or fiber amplifiers, featuring a preferably rare-earth-doped silica active core surrounded by a pure or doped silica cladding layer ("pump core"). The pump core is surrounded by a doped or pure silica inner cladding for guiding pumping radiation within the pump core. Thus, the refractive index of the inner cladding is lower than that of the pump core. The fiber is surrounded by a protective coating made of polymeric material. One or more additional outer cladding layers, having refractive indexes lower than said inner cladding, may optionally be placed between the inner cladding and the protective coating to further protect the polymer coating from damage. Unlike the prior art, the protective coating does not serve as the only cladding, but is assisted by the inner cladding and optional outer cladding(s). The resultant fiber restricts radiation mainly to silica layers, thereby increasing the damage threshold and the applicable maximum pump power of the fiber.

A novel class of semiconductor light-emitting devices, or “tilted cavity light-emitting devices” is disclosed. The device includes at least one active element, generally placed within a cavity, with an active region generating an optical gain by injection of a current and two mirrors. The device generates optical modes that propagate in directions, which are tilted with respect to both the p-n junction plane and the direction normal to this plane. A light-emitting diode is also disclosed, where the cavity and the mirrors are designed such that transmission of generated optical power within a certain spectral range and within a certain interval of angles to the substrate is minimized. Transmission of optical power within a certain spectral range, which corresponds to the emission range of the light-emitting active medium and within a certain interval of angles out of the device, is optimized to achieve a required output power level.

The present invention provides for a one or more layer graphene optical modulator. In a first exemplary embodiment the optical modulator includes an optical waveguide, a nanoscale oxide spacer adjacent to a working region of the waveguide, and a monolayer graphene sheet adjacent to the spacer. In a second exemplary embodiment, the optical modulator includes at least one pair of active media, where the pair includes an oxide spacer, a first monolayer graphene sheet adjacent to a first side of the spacer, and a second monolayer graphene sheet adjacent to a second side of the spacer, and at least one optical waveguide adjacent to the pair.

Streaming media network parameters are measured using an electronic system and displayed directly to a user or transmitted via an electronic interface such as an existing system network conduit (i.e. Ethernet, USB, or other packet-based architectures), either in or out-of-band. A scalable hardware and / or software compute engine filters and reduces network parameters to simplify tracking the instantaneous and long term streaming media performance of the network. Hence, the entire set of active media streams is continuously monitored concurrently, thereby providing the ability to detect impairments as well as predict impending impairments. The prediction of impairments gives rise to the ability to protect the end-user of the streaming media from experiencing any impairments. In one example, an existing packetized network conduit containing streaming media is tapped to concurrently and objectively analyze the streaming media streams, producing statistics (such as delay factor and media loss rate) and alarm-type events according to predetermined rules. Tapping the existing packetized network in multiple points provides comparison points and assists in pinpointing the source(s) of the impairment(s).

A microfluidic sieve having a substrate with a microfluidic channel, and a carbon nanotube mesh. The carbon nanotube mesh is formed from a plurality of intertwined free-standing carbon nanotubes which are fixedly attached within the channel for separating, concentrating, and / or filtering molecules flowed through the channel. In one embodiment, the microfluidic sieve is fabricated by providing a substrate having a microfluidic channel, and growing the intertwined free-standing carbon nanotubes from within the channel to produce the carbon nanotube mesh attached within the channel.

A system and method for managing media content between media devices is disclosed. In a centralized embodiment, a server monitors the media devices actively connected to the network and maintains information on each of the active media devices. The information includes the functions of each of the active media devices for processing media content. The server receives a request for media content and determines functions required to process the media content. The server then determines which of the active media devices have the required functions to process the media content and sends instructions to the determined media devices to configure processing of the media content. In response, the determined media devices process the media content, and the processed media content is delivered at the requesting media device. In a decentralized embodiment, the functions performed by the server are distributed among the various devices of the network.

A solid state Raman laser includes a laser pump for producing a first radiation at a high power and at a first wavelength along an optical path, a solid Raman active medium in the optical path of the first radiation, the medium including single crystal diamond having a first surface and a second surface, where the first radiation at a high power produces stimulated Raman scattering in the medium and the medium generates a second radiation at a second wavelength, a first optical element in the optical path of the first radiation, wherein the first optical element allows the first wavelength to be transmitted and allows the second wavelength to be reflected, and a second optical element in the optical path of the first radiation, wherein the second optical element allows the first wavelength to be transmitted and allows the second wavelength to be reflected.

The invention relates to pumping equipment. The inventive jet device comprises a packer, a pipe column and a cradle in which drain ports are embodied and on which a jet pump is mounted in a body. Said body is provided with a channel for supplying an active medium to the nozzle, a channel for supplying a pumped-out medium, and a channel for evacuating the mixture of said mediums. The body also comprises a through channel embodied therein above the channel for supplying a pumped-out medium, connected thereto and used for arranging a sealing unit. Said sealing unit comprises a channel for passing the pumped out medium of a cable and a channel for supplying the pumped out medium of the cable used for arranging instruments and equipment. The channel for supplying a pumped-out the active medium is connected to the drain ports and to the space around the pipe column by means of said ports. The channel for evacuating the mixture the mediums from the jet pump is connected to the internal space of tubes above the jet pump. The sealing unit is embodied in such a way that it makes it possible to arrange thereinside a mechanism for bringing in the well and extracting therefrom the body containing the jet pump. A threaded hole for connecting autonomous measuring instruments to the body is embodied in the lower part thereof.

Disclosed is an air purification filter with novel active media that attracts, migrates, binds, and destroys pathogens, including sub-micron pathogens, that are suspended in the air passing through the filter. These properties are incorporated in the micro-fibers comprising the active filter media by several novel methods. One embodiment uses polymers or solgel bound monomers of quaternary ammonium compounds as a biocide with both chemotactic and pathogen membrane lysing properties. Another embodiment uses biocide chemicals blended into the melt before filter fibers are extruded and electret dipole charged. The attracting-binding properties of the embodiments may be enhanced by including electropositive Boehmite nano-fiber strands in the active media, by coating a reversible voltage charged electro-conductive polymer, by the use of supplemental fusing and lysing chemicals, and by optional ion field charging of incoming pathogens.

A rare earth-doped solid-state integrated laser which includes an optical waveguide, and a laser cavity including at least one subwavelength mirror. The subwavelength mirror is disposed in or on the optical waveguide. The optical waveguide portion within the laser cavity includes active media comprising both a rare earth and semiconducting atoms or compounds. A structure for pumping the semiconducting semiconducting atoms or compounds is provided, such as electrodes sandwiching the active media wherein the semiconducting atoms or compounds transfer energy obtained from the pumping to the rare earth, thus permitting the laser to laze.

A Raman laser system, the system comprising a resonator cavity comprising a plurality of reflectors, wherein at least one reflector is an output reflector adapted for outputting a pulsed output beam from the resonator cavity at a frequency corresponding to a Raman shifted frequency of the pump beam, wherein the output reflector is partially transmitting at the Raman-converted frequency; a solid state Raman-active medium located in the resonator cavity to be pumped by a pulsed pump beam having a pump repetition rate and for Raman-converting a pump pulse incident on the Raman-active medium to a resonating pulse at a Raman-converted frequency resonating in the resonator cavity; a resonator adjuster for adjusting the optical length of the resonator to match the round-trip time of the resonating Raman-converted pulse with the pump beam repetition rate such that the resonating pulse is coincident both temporally and spatially with a pump pulse in the Raman-active medium on each round trip, to Raman amplify the resonating pulse at the Raman-converted frequency in the Raman-active medium. Also a multiwavelength Raman laser system further comprising a dispersive element and a plurality of coupled resonator cavities. Also, methods for providing ultrafast pulsed Raman laser operation.

The present invention relates to a method and system for high spatial resolution measurement of a magnetic field or gradient. The method determines Zeeman polarization at a submicron distance from cell surfaces of an optical pumping cell using two laser beams. A strong pump beam produces Zeeman polarization in the vicinity of surfaces inside the optical pumping cell. The Zeeman polarization precesses around the magnetic field that is to be measured and is probed by the evanescent wave of a weak probe beam. The precessing Zeeman polarization can be monitored by measuring reflectivity of the probe beam at an interface between the active medium and the cell. The polarization can be used to measure the magnetic field or gradient. In one embodiment a second probe beam in the yz-plane is incident on the same position as the pump beam and the first probe beam that is in the xz-plane. Both probe beams undergo total internal reflection at an interface between the cell surface and the active medium. The reflectivities of the two probe beams are measured, from which the x, y and z components of the magnetic field can be determined simultaneously.

Water soluble plant growth regulating compositions in granule form and methods for making and using same. The granules comprise an active medium, a carrier medium and optionally a surfactant, wherein the active medium comprises: a gibberellin, a cytokinin, and an auxin. The inventive compositions are shelf stable and may be completely dissolved in water prior to application on a plant or seed.

A superbroadband or multiwavelength laser transmitter source for wavelength-division multiplexing, two-wavelength interferometry, differential lidar and optical storage applications. Contrary to conventional tunable laser sources that can switch between different lasing wavelengths in a given wavelength band, the superbroadband laser simultaneously emits at multiple wavelengths. The basic idea of this system is to maintain simultaneous lasing operation in an optical active gain medium at different wavelengths. The system uses a novel dispersive cavity. By designing this cavity structure appropriately, the system creates its own microcavities each lasing at a different wavelength within the fluorescence band of the gain medium. Mode competition in the proposed cavity is absent and spectral range of simultaneous multi-frequency generation is considerably enhanced practically to the spectral width of the active media luminescence spectrum. As a result, the radiation of each mode with its own wavelength is amplified in the active media independently from the simultaneous amplification of the rest of the wavelengths.

The invention relates to a laser amplifier system consisting of a solid body, which comprises a laser-active medium, of a pumping radiation source for generating a pumping radiation field, which repeatedly permeates the solid body, and of a focusing system. Said focusing system generates a number of different branches of the pumping radiation field that enter the solid body and converts at least one branch emerging from the solid body into one of the branches which enter the solid body and which are different from the emerging branch. The aim of the invention is to improve a laser amplifier system of the aforementioned type in order to be able to generate the highest possible pumping power density in the solid body while requiring the smallest possible amount of complexity. To this end, the focusing system comprises at least one deviating unit which converts, by deviating the radiation field with regard to a single plane of symmetry, at least two first partial branches formed from at least two different branches of the pumping radiation field emerging from the solid into at least two corresponding second partial branches which locally extend in a manner that is separate from the first partial branches and of which at least two branches entering the solid body are formed.

A semiconductor diode laser having a broad vertical waveguide and a broad lateral waveguide is disclosed emitting laser-light in a single vertical mode and a single lateral mode narrow beam. The vertical waveguide comprises a coupled cavity structure, wherein light, generated in the active medium placed in the first cavity leaks into the second cavity and returns back. Phase matching conditions govern the selection of a single vertical mode. A multi-stripe lateral waveguide comprises preferably a lateral photonic band crystal with a lateral optical defect created by selected pumping of multistripes. This approach allows the selection of a single lateral mode having a higher optical confinement factor and / or a lower absorption loss and / or a lower leakage loss compared to the rest lateral optical modes. This enables a single lateral mode lasing from a broad area field coupled laser array. A laser system comprised of multiple field coupled laser arrays on a single wafer and a set of external mirrors enables an ultra-broad field coupled laser bar emitting a coherent laser light in a single vertical optical mode and a single lateral optical mode. A laser system comprised of multiple ultra-broad field coupled laser bars on different wafers and a set of external mirrors enables an ultra-broad field coupled laser stack emitting coherent laser light in a single vertical optical mode and a single lateral optical mode. This allows realization of ultrahigh power ultrahigh brightness laser systems based on semiconductor diode lasers.

An optical system adapted to amplify an input signal includes an optical pump supporting the input signal and an optical pump beam. The optical pump includes an input port, a first active medium coupled to the input port, and a pump output coupled to the first active medium. The optical amplifier includes an amplifier input optically coupled to the pump output and adapted to receive the input signal after passing through the optical pump, a second active medium coupled to the amplifier input, and an amplifier output adapted to output the amplified input signal.

A flat panel display device is presented. The device includes at least one display module in the form of a matrix of pixels formed by active media enclosed between two sets of conductors. The display module has a front side by which it is to be exposed to viewers and an opposite back side where an electronic control circuit is located, and comprises two sets of electrical conductors extending along two intersecting axes respectively to define a two-dimensional array of junctions forming said pixels, each of the conductors of at least one set of conductors being bent to extend from the front side to the opposite back side of the display module.

In a packet-based telephony network, a media gateway provides information on active media path connections to an active call server. For instance, this data may be provided to a backup call server to keep the backup call server in a warm standby mode. The backup call server polls a media gateway to retrieve a table of information on active media path connections. The polling may be done periodically or only during switchover from the active call server to the backup call server. After switchover, the backup call server has all necessary details about active media path connections to provide accurate billing information. Alternatively, after a temporary failure at the active call server, the active call server may send a request to the media gateway to retrieve a table of information on active media path connections.

A nanostructure is used to generate a highly localized nanoscale optical field. The field is excited using surface plasmon amplification by stimulated emission of radiation (SPASER). The SPASER radiation consists of surface plasmons that undergo stimulated emission, but in contrast to photons can be localized within a nanoscale region. A SPASER can incorporate an active medium formed by two-level emitters, excited by an energy source, such as an optical, electrical, or chemical energy source. The active medium may be quantum dots, which transfer excitation energy by radiationless transitions to a resonant nanosystem that can play the same role as a laser cavity in a conventional laser. The transitions are stimulated by the surface plasmons in the nanostructure, causing the buildup of a macroscopic number of surface plasmons in a single mode.

The present invention relates to an extended cavity semiconductor laser device comprising an array of at least two semiconductor gain elements (20, 21), each of said semiconductor gain elements (20, 21) comprising a layer structure (1) forming a first end mirror (2) and an active medium (3). A coupling component (22) inside of the device combines fundamental laser radiation emitted by said array of semiconductor gain elements (20, 21) to a single combined laser beam (25). A second end mirror (23) reflects at least part of said single combined laser beam (23) back to said coupling component (22) to form extended cavities with the first end mirrors (2). Due to this coherent coupling of several extended cavity semiconductor lasers a single beam of the fundamental radiation is generated with increased intensity, good beam profile and narrow spectral band width. This beam of increased intensity is much better suited for frequency conversion via upconversion or via second harmonic generation than the individual beams of the array of extended cavity semiconductor laser components. The efficiency of frequency conversion is therefore greatly enhanced.