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| Number | Title | Issue Date |
| 7352506 | Method and system for sensing environmental characteristics A system for sensing characteristics of the environment is disclosed. Sensors utilize exponential growth of a signal initiated by interaction of a sensor element with characteristics of the environment. Specific substances in the environment can be detected. The sen... | 04/01/2008 |
| 7286734 | Optical microresonator with coupling elements for changing light direction An optical microresonator includes a microcylinder and resonant waveguide formed on the microcylinder as a plurality of spaced resonant elements, for example, spaced ridges, and coupling elements operative with the resonant elements for optically coupling light from... | 10/23/2007 |
| 7236679 | Optical microresonator coupling system and associated method An optical microresonator coupling system includes an optical source waveguide through which light travels. A microcylinder is positioned adjacent the optical source guide and has a resonant waveguide formed as spaced resonant elements, such as circumferential ridge... | 06/26/2007 |
| 7224866 | Apparatus and method for forming an optical microresonator An apparatus and method forms an optical microresonator and includes spaced high precision ferrules through which an optical fiber passes. A ferrule can be rotatable and movable longitudinally in an axial direction. A clamp engages a ferrule and is operable to secur... | 05/29/2007 |
| 7190860 | Spiral waveguide slow wave resonator structure An optical microresonator includes microcylinder and spiral resonant waveguide formed on the microcylinder that optically couples light from an optical source waveguide to the microcylinder and slows light propagating along the microcylinder. A coupling element, for... | 03/13/2007 |
| 7187827 | Coupled waveguide optical microresonator A coupled waveguide optical microresonator is formed from a plurality of microcylinders coupled together. Each microcylinder includes a resonant waveguide. At least one of the microcylinders is adapted to be positioned adjacent an optical source waveguide for optica... | 03/06/2007 |
| 7184629 | Spiral waveguide slow wave resonator structure An optical microresonator includes microcylinder and spiral resonant waveguide formed on the microcylinder that optically couples light from an optical source waveguide to the microcylinder and slows light propagating along the microcylinder. A coupling element, for... | 02/27/2007 |
| 7164526 | Parametric amplification using two pump waves An optical parametric amplifier (OPA) driven with at least two pump waves. The pump waves may be configured such that the OPA produces uniform exponential gain over a range of wavelengths that extends, for example, at least 30 nm on either side of the average pump-w... | 01/16/2007 |
| 7130045 | Monochromator and method of use A monochromator for isolating or recombining a narrowband optical signal from a broadband signal. A cylinder with a continuous outer wall and two planar end surfaces is composed of a dispersive medium. The cylinder forms a multi-reflective cavity, wherein a broadban... | 10/31/2006 |
| 7068119 | Fixed impedance shielded differential pair with pairs of side ground plane vias A system and method for transferring information at a fast rate between add-in cards in a rack mount system are described. In one embodiment, the invention allow all the add-in cards within the rack mount system to be interconnected. All the main cards within the ra... | 06/27/2006 |
| 6956878 | Method and apparatus for reducing laser speckle using polarization averaging A method and apparatus for reducing speckle uses polarization averaging. A polarizing beam splitter divides a first polarized laser output into a second polarized laser output and a third polarized laser output. A plurality of mirrors creates an optical path differe... | 10/18/2005 |
| 6281746 | Parametric cavity microwave amplifier A microwave parametric amplifier uses a circulator to receive an input signal which is provided through a transfer port to an input signal resonant cavity. A pump signal, which is preferably a harmonic of the input signal, is received into a pump signal c... | 08/28/2001 |
| 6265934 | Q-switched parametric cavity amplifier A Q-switched parametric cavity microwave amplifier has input and output ports for receiving an input signal and producing a switched amplified output signal. A pump signal, preferably at a harmonic of the input signal, is received through a pump signal po... | 07/24/2001 |
| 4839607 | Frequency-doubling amplifying surface wave receiver An amplifying surface wave receiver for a surface wave element composed of a material which has the piezo effect and which can be rendered electrically conductive by local doping wherein a doped region is formed at the upper portion of an insulating subst... | 06/13/1989 |
| 4801847 | Charged particle accelerator using quadrupole electrodes A charged particle accelerator is provided with quadrupole electrodes with surfaces that are opposed to each other and are undulated, and with an external resonance circuit. The external resonance circuit consists of a capacitor formed by the opposing ele... | 01/31/1989 |
| 4758795 | Microwave pulse compression in dispersive plasmas A plasma-filled waveguide acts as a dispersive element for pulse compression or power multiplication of a frequency chirped microwave signal. In one embodiment, the frequency of the source is chirped near a plasma resonance while the plasma waveguide is h... | 07/19/1988 |
| 4691173 | RF input drive saturation control loop A system for optimizing the RF input drive to a TWT amplifier over a frequency band of interest is disclosed. The system includes a microprocessor-based controller, an RF detector for detecting the TWT output, and a variable attenuator for adjusting the i... | 09/01/1987 |
| 4611140 | Saw-CTD parallel to serial imager A line imager comprising: a semiconductor body; a planar, transparent piezoelectric body having a main surface overlying and in proximity to the semiconductor body; wave propagation means for propagating acoustic waves on the main surface of the piezoelec... | 09/09/1986 |
| 4600853 | Saw-CTD serial to parallel imager and waveform recorder A device for the high speed recording of photon images and nonrepetitive electrical waveforms which comprises a waveform recorder wherein surface acoustic waves excited in a can be GaAs, not layered piezoelectric-insulator-semiconductor layered structure ... | 07/15/1986 |
| 4543533 | Parametric amplifier The parametric amplifier includes plurality of parameter changing or exciting regions provided in a periodic array on a wave propagation medium having the property that waves having different frequencies travel through the medium at different velocities, ... | 09/24/1985 |
| 4439860 | Optical pumping in a whispering mode optical waveguide A device and method for optical pumping in a whispering mode optical waveguide. Both a helical ribbon and cylinder are disclosed which incorporate an additional curvature for confining the beam to increase intensity. An optical pumping medium is disposed ... | 03/27/1984 |
| 4389590 | System for recording waveforms using spatial dispersion A waveform recorder wherein surface acoustic waves excited in a piezoelecc-insulator-semiconductor layered structure produce a traveling electric field in the semiconductor substrate. Charges stored in the traveling potential wells and representing the i... | 06/21/1983 |
| 4348599 | Process and device for delivering a monochromatic light beam by stimulated scattering For generation of a light beam having a narrow linewidth, an energy extraction beam of narrow linewidth, typically from a pulsed laser, is directed into a Raman medium having a large stimulated line. A second source, typically a pulsed laser, delivers a b... | 09/07/1982 |
| 4344052 | Distributed array of Josephson devices with coherence Josephson devices are distributed in series in a transmission line structure in which electromagnetic waves are used to synchronize the dynamics of the Josephson devices in order to achieve coherence between the devices. Electromagnetic waves, such as osc... | 08/10/1982 |
| 4338570 | Raman scattering in a whispering mode optical waveguide A device and method for Raman scattering in a whispering mode optical waveguide. Both a helical ribbon and cylinder are disclosed which incorporate an additional curvature .rho. p for confining the beam to increase intensity. A Raman scattering medium is ... | 07/06/1982 |
| 4224577 | Multistaged stokes injected Raman capillary waveguide amplifier A multistaged Stokes injected Raman capillary waveguide amplifier for providing a high gain Stokes output signal. The amplifier uses a plurality of optically coupled capillary waveguide amplifiers and one or more regenerative amplifiers to increase Stokes... | 09/23/1980 |
| 4222011 | Stokes injected Raman capillary waveguide amplifier A device for producing stimulated Raman scattering of CO2 laser radiation by rotational states in a diatomic molecular gas utilizing a Stokes injection signal. The system utilizes a cryogenically cooled waveguide for extending focal interaction... | 09/09/1980 |
| 4158177 | Parametric coupling device for traveling-waves Parametric coupling device for traveling-waves, comprising a first signal wave, a second idler wave and a third pump wave, wherein a transmission line for said traveling-waves is formed on a substrate of dielectric material, which comprises a virtually co... | 06/12/1979 |
| 4132956 | Circuit arrangement for amplifying high frequency electromagnetic waves A circuit for amplifying high frequency electromagnetic waves composed of a Josephson junction constituting an electromagnetic high frequency line along which electromagnetic waves can propagate at a signal frequency and at least one idler frequency, the ... | 01/02/1979 |
