Patent application number | Description | Published |
20140359030 | DIFFERENTIATION OF MESSAGES FOR RECEIVERS THEREOF - A solution for sending messages on a data-processing system is proposed. A corresponding method comprises upon a message to be sent from a sender to at least one receiver being submitted, parsing the message to identify an original expression therein matching an indication of one of a set of pre-defined concepts, determining, for the receiver, a preferred expression of the matched concept, among the corresponding original expression and a set of candidate expressions pre-defined to express the matched concept, according to a rating thereof representing an expected understanding by the receiver, processing the message for the receiver by replacing the original expression according, to the corresponding preferred expression for the receiver, and sending the processed message to the corresponding receiver. | 12-04-2014 |
20140359039 | DIFFERENTIATION OF MESSAGES FOR RECEIVERS THEREOF - A solution for sending messages on a data-processing system is proposed. A corresponding method comprises upon a message to be sent from a sender to at least one receiver being submitted, parsing the message to identify an original expression therein matching an indication of one of a set of pre-defined concepts, determining, for the receiver, a preferred expression of the matched concept, among the corresponding original expression and a set of candidate expressions pre-defined to express the matched concept, according to a rating thereof representing an expected understanding by the receiver, processing the message for the receiver by replacing the original expression according, to the corresponding preferred expression for the receiver, and sending the processed message to the corresponding receiver. | 12-04-2014 |
Patent application number | Description | Published |
20090213890 | QUANTUM CASCADE LASER - A quantum cascade laser utilizing non-resonant extraction design having a multilayered semiconductor with a single type of carrier; at least two final levels ( | 08-27-2009 |
20100135337 | METHODS AND APPARATUS FOR GENERATING TERAHERTZ RADIATION - Apparatus and methods for generating radiation via difference frequency generation (DFG). In one exemplary implementation, a quantum cascade laser (QCL) has a significant second-order nonlinear susceptibility (χ | 06-03-2010 |
20100186809 | NANOWIRE- BASED SOLAR CELL STRUCTURE - The solar cell structure according to the present invention comprises a nanowire ( | 07-29-2010 |
20100226134 | Methods and Apparatus for Improving Collimation of Radiation Beams - An apparatus for collimating radiation can include an aperture of subwavelength dimensions and a neighboring set of grooves defined on a metal film integrated with an active or passive device that emits radiation. Integration of the beam collimator onto the facet of a laser or other radiation-emitting device provides for beam collimation and polarization selection. Beam divergence can be reduced by more than one order of magnitude compared with the output of a conventional laser. An active beam collimator with an aperture-groove structure can be integrated with a wide range of optical devices, such as semiconductor lasers (e.g., quantum cascade lasers), light emitting diodes, optical fibers, and fiber lasers. | 09-09-2010 |
20110058176 | SPECTROMETERS UTILIZING MID INFRARED ULTRA BROADBAND HIGH BRIGHTNESS LIGHT SOURCES - A mid infrared spectrometer comprises a high brightness broadband source that generates an output with a broad spectral range in the order of hundreds of wave numbers, a wavelength dispersive element and a detector. In one embodiment, the source comprises an array of semiconductor laser devices operating simultaneously. Each device emits light at wavelength different from the wavelengths emitted by the other devices in the array and the devices are arranged so that the combined output continuously covers the broad spectral range. In another embodiment, each of the lasers in the array is a quantum cascade laser device. In still another embodiment, the quantum cascade laser devices in the array are operated in the regime of Risken-Nummedal-Graham-Haken (RNGH) instabilities. In yet another embodiment, each of the lasers in the array is a mode-locked quantum cascade laser device. | 03-10-2011 |
20110180894 | NANOSTRUCTURED PHOTODIODE - The present invention provides a photodiode comprising a p-i-n or pn junction at least partly formed by first and second regions ( | 07-28-2011 |
20110310915 | METHODS AND APPARATUS FOR SINGLE-MODE SELECTION IN QUANTUM CASCADE LASERS - Methods and apparatus for improved single-mode selection in a quantum cascade laser. In one example, a distributed feedback grating incorporates both index-coupling and loss-coupling components. The loss-coupling component facilitates selection of one mode from two possible emission modes by periodically incorporating a thin layer of “lossy” semiconductor material on top of the active region to introduce a sufficiently large loss difference between the two modes. The lossy layer is doped to a level sufficient to induce considerable free-carrier absorption losses for one of the two modes while allowing sufficient gain for the other of the two modes. In alternative implementations, the highly-doped layer may be replaced by other low-dimensional structures such as quantum wells, quantum wires, and quantum dots with significant engineered intraband absorption to selectively increase the free-carrier absorption losses for one of multiple possible modes so as to facilitate single-mode operation. | 12-22-2011 |
20110315898 | Plasmonic Polarizer - A radiation-emitting device (e.g., a laser) includes an active region configured to generate a radiation emission linearly polarized along a first polarization direction and a device facet covered by an insulating layer and a metal layer on the insulating layer. The metal layer defines an aperture through which the radiation emission from the active region can be transmitted and coupled into surface plasmons on the outer side of the metal layer. The long axis of the aperture is non-orthogonal to the first polarization direction, and a sequential series of features are defined in or on the device facet or in the metal layer and spaced apart from the aperture, wherein the series of features are configured to manipulate the surface plasmons and to scatter surface plasmons into the far field with a second polarization direction distinct from the first polarization direction. | 12-29-2011 |
20120033697 | WAVELENGTH BEAM COMBINING OF QUANTUM CASCADE LASER ARRAYS - A laser source based on a quantum cascade laser array (QCL), wherein the outputs of at least two elements in the array are collimated and overlapped in the far field using an external diffraction grating and a transform lens. | 02-09-2012 |
20130148678 | QUANTUM CASCADE LASER SOURCE WITH ULTRABROADBAND SPECTRAL COVERAGE - A broadband quantum cascade laser includes multiple gain regions and a spacer layer disposed between at least two of the gain regions. The arrangement and characteristics of the gain regions and the spacer layer may be configured to reduce cross absorption between the gain regions. For example, one gain region may be configured to produce gain in an energy range in which another gain region produces absorptive effects. The thickness of the spacer layer may be selected to separate optical modes produced by adjacent gain regions while still producing a single broadband output from the quantum cascade laser. Gain competition between gain stages within a gain region may be mitigated by dividing gain stages with overlapping gain curves among multiple gain regions. | 06-13-2013 |
20130208332 | Amplitude, Phase and Polarization Plate for Photonics - An optical plate includes a substrate and a resonator structure formed on or in the substrate, wherein the resonator structure is configured to produce an abrupt change in phase, amplitude and/or polarization of incident radiation. | 08-15-2013 |
20130208743 | BROADBAND QUANTUM CASCADE LASER SOURCE - A broadband quantum cascade laser (QCL) source includes one or more QCLs having an active region designed based on a diagonal laser transition. The QCL source may include multiple QCLs formed in an array or the QCL source may comprise a single QCL device. Although each QCL provides an emission spectrum comprising a small range of wavelengths at a given applied voltage, changes in the applied operating voltage result in changes in the emission spectrum of the QCL due to the Stark shift. When the QCL source comprises a plurality of QCLs formed in an array, at least some of the elements in the array may receive different applied operating voltages such that the combined output spectrum of the array is broader than that achievable by a single QCL. When the QCL source comprises a single QCL device, an applied operating voltage may be swept through a range of applied voltages such that that combined output spectrum over one sweep cycle is broader than the output spectrum of the QCL device when a static operating voltage is applied. Alternatively, the single QCL device may comprise multiple independent gain sections, wherein each of the independent gain sections is configured to operate at a different voltages to provide a broadband output spectrum. | 08-15-2013 |
20130266034 | METHODS AND APPARATUSES FOR ENGINEERING ELECTROMAGNETIC RADIATION - laser devices described may emit a beam of electromagnetic radiation having a large wavelength (e.g., mid-infrared, far-infrared) and exhibiting a low angle of divergence. In some embodiments, the wavelength of the electromagnetic radiation is between | 10-10-2013 |
20140016895 | Plasmonic Polarizer - A radiation-emitting device (e.g., a laser) includes an active region configured to generate a radiation emission linearly polarized along a first polarization direction and a device facet covered by an insulating layer and a metal layer on the insulating layer. The metal layer defines an aperture through which the radiation emission from the active region can be transmitted and coupled into surface plasmons on the outer side of the metal layer. The long axis of the aperture is non-orthogonal to the first polarization direction, and a sequential series of features are defined in or on the device facet or in the metal layer and spaced apart from the aperture, wherein the series of features are configured to manipulate the surface plasmons and to scatter surface plasmons into the far field with a second polarization direction distinct from the first polarization direction. | 01-16-2014 |