| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Heterogeneous microwave photonic circuits | US13605658 | 2012-09-06 | US09166678B1 | 2015-10-20 | Gregory Alan Fish; Volkan Kaman; Anand Ramaswamy |
| Embodiments of the invention describe (M)MPICs, which include RF processing components and heterogeneous silicon photonic components that include a first region of silicon material and a second region of non-silicon material with high electro-optic efficiency (e.g., III-V material). Said heterogeneous silicon components are fabricated from the silicon and non-silicon material, and therefore may be interconnected via silicon/non-silicon waveguides formed from the above described regions of silicon/non-silicon material. The effect of interconnecting these components via said optical waveguides is that an RF signal may be processed using photonic components consistent with the size of an MMIC, without the need for any optical fibers; therefore, embodiments of the invention describe a chip scale microwave IC that has the broad optical bandwidth of photonics without any optical interfaces to fiber. Furthermore, in some embodiments, the RF processing components, heterogeneous photonic components, and control circuitry may be included in the same chip-scale package. | ||||||
| 162 | Isolation of RF Signals using Optical Single Side Band Modulation Combined with Optical Filtering | US14223035 | 2014-03-24 | US20150270906A1 | 2015-09-24 | Preetpaul S Devgan |
| A method and apparatus for isolating an RF signal are provided. A first RF signal is received and passed to an input of a 90 degree hybrid. An output of the 90 degree hybrid is connected to a first waveguide and a second output is connected to a second waveguide of an optical modulator. A second RF signal is received and passed to an input of a second 90 degree hybrid. An output of the second 90 degree hybrid is connected to the second waveguide and a second output is connected to the first waveguide of the optical modulator. The optical modulator is biased to produce single side band optical outputs of the RF signals. The single side band optical outputs are passed to an optical notch filter to remove one of the side band outputs. The other of the side band optical outputs is converted to an electrical signal. | ||||||
| 163 | Tunable RF filter device using optical waveguide paths with splitter and combiner pairs and related methods | US14596408 | 2015-01-14 | US09116366B2 | 2015-08-25 | Richard DeSalvo; Charles Middleton |
| A tunable Radio Frequency (RF) filter device includes a tunable optical source generating an optical carrier signal, and a modulator coupled to the tunable optical source and modulating the optical carrier signal with an RF input signal. The tunable RF filter device may include first and second optical waveguide paths coupled to the modulator and having first and second dispersion slopes of opposite sign from each other, one or more of the first and second optical waveguide paths comprising an optical splitter and combiner pair therein, and an optical-to-electrical converter coupled to the first and second optical waveguide paths and generating an RF output signal with a frequency notch therein based upon the tunable optical source. | ||||||
| 164 | TUNABLE RF FILTER DEVICE USING OPTICAL WAVEGUIDE PATHS WITH SPLITTER AND COMBINER PAIRS AND RELATED METHODS | US14596408 | 2015-01-14 | US20150125108A1 | 2015-05-07 | Richard DESALVO; Charles MIDDLETON |
| A tunable Radio Frequency (RF) filter device includes a tunable optical source generating an optical carrier signal, and a modulator coupled to the tunable optical source and modulating the optical carrier signal with an RF input signal. The tunable RF filter device may include first and second optical waveguide paths coupled to the modulator and having first and second dispersion slopes of opposite sign from each other, one or more of the first and second optical waveguide paths comprising an optical splitter and combiner pair therein, and an optical-to-electrical converter coupled to the first and second optical waveguide paths and generating an RF output signal with a frequency notch therein based upon the tunable optical source. | ||||||
| 165 | PHOTONIC RF GENERATOR | US14376422 | 2012-02-07 | US20150110494A1 | 2015-04-23 | Paolo Ghelfi; Filippo Scotti; Francesco Laghezza; Antonella Bogoni |
| An RF signal generator has an optical part for outputting optical carrier signals separated in optical frequency, and a modulator arranged to modulate the optical carrier signals with an intermediate frequency to generate sidebands. A phase modulation is applied to one or more of the sidebands or the optical carriers, without applying the phase modulation to others of the signals, and the modulator has integrated optical paths for both the phase modulated signals and for the others of the signals. A detector part carries out heterodyne detection to combine the phase modulated and other signals to output an RF signal having the phase modulation. By having integrated optical paths, the relative phase of these optical paths can be more stable than using a fiber sagnac interferometer and optical isolator thus enabling use in advanced radio communications. | ||||||
| 166 | Tunable RF filter device using optical waveguides with dispersion slopes of opposite signs and related methods | US14488698 | 2014-09-17 | US09002143B2 | 2015-04-07 | Richard Desalvo; Charles Franklin Middleton, IV |
| A tunable Radio Frequency (RF) filter device includes a tunable optical source configured to generate an optical carrier signal, and a modulator coupled to the tunable optical source and configured to modulate the optical carrier signal with an RF input signal. The tunable RF filter device may also include first and second optical waveguides coupled to the modulator and having first and second dispersion slopes of opposite sign, and an optical-to-electrical converter coupled to the first and second optical waveguides and configured to generate an RF output signal with a frequency notch therein based upon the tunable optical source. | ||||||
| 167 | Tunable RF filter device using optical waveguide paths with splitter and combiner pairs and related methods | US13189810 | 2011-07-25 | US08971671B2 | 2015-03-03 | Richard DeSalvo; Charles Middleton |
| A tunable Radio Frequency (RF) filter device includes a tunable optical source generating an optical carrier signal, and a modulator coupled to the tunable optical source and modulating the optical carrier signal with an RF input signal. The tunable RF filter device may include first and second optical waveguide paths coupled to the modulator and having first and second dispersion slopes of opposite sign from each other, one or more of the first and second optical waveguide paths comprising an optical splitter and combiner pair therein, and an optical-to-electrical converter coupled to the first and second optical waveguide paths and generating an RF output signal with a frequency notch therein based upon the tunable optical source. | ||||||
| 168 | Analog Radio Frequency Memory For Signal Replication | US14337630 | 2014-07-22 | US20150031285A1 | 2015-01-29 | Julius Insler |
| A method and system for processing a signal in the RF environment is disclosed. The method includes using an Analog Radio Frequency Memory (ARFM) to store an analog amplitude representation of the signal in the form of elemental charge packets. The stored signal is played back by converting the elemental charge packets back to their representative voltages to rejuvenate the original signal. | ||||||
| 169 | SYSTEM AND METHOD FOR REMOVING FAR FIELD LIMITATIONS IN MICROWAVE PHOTONIC ARBITRARY WAVEFORM GENERATORS | US14215960 | 2014-03-17 | US20140376926A1 | 2014-12-25 | Andrew Marc Weiner; Amir Dezfooliyan |
| A photonic waveform generator and a method of generating an electrical waveform based on a photonic signal are disclosed. The generator includes an input port for receiving an optical signal, a pulse shaper coupled to the input port and configured to Fourier transform the optical signal and apply a pre-distort waveform onto optical spectrum of the optical signal, a dispersive pulse stretcher coupled to the pulse shaper, an optical-to-electrical converter coupled to the dispersive pulse stretcher, and an output port coupled to the optical-to-electrical converter, the pre-distortion removes distortion of the electrical signal that exists in the absence of the pre-distortion caused by violation of far field limitation between the optical signal and the electrical signal. | ||||||
| 170 | Method and apparatus for analyzing the spectrum of radio-frequency signals using a fiber optic recirculation loop | US13677659 | 2012-11-15 | US08861567B2 | 2014-10-14 | Ming-Chiang Li; Weimin Zhou |
| An apparatus comprising a fiber optical loop for conducting a first and a second pulse having a corresponding first and second wavelength, a first splitter for separating the first and second light pulses in the optical loop into a first and second light path to introduce a predetermined time delay between the first and second light pulses, a coupler for tapping a replica of the pair of light pulses from the loop, an auto-correlation module, coupled to the coupler, for correlating the replica of the pair of light pulses with each other to produce a set of data points comprising a plurality of multiplied and correlated pair of pulses and a transform module, coupled to the auto-correlation module, for transforming the data points into a channelized frequency spectrum. | ||||||
| 171 | Multi-mode optoelectronic oscillator | US13617144 | 2012-09-14 | US08824901B2 | 2014-09-02 | Preetpaul S Devgan; Vincent J Urick; Keith J Williams |
| A multi-mode optoelectronic oscillator (MM-OEO) includes an OEO cavity having an input for receiving an RF signal and an RF output. The OEO cavity includes a) a first laser having a first laser output, a second laser having a second laser output, b) a modulator having i) a first input coupled to the first laser output, ii) a second input coupled to the second laser output, iii) a third input, iv) a first modulator output, and v) a second modulator output, c) a semiconductor optical amplifier (SOA) having an input coupled to the first modulator output and having an SOA amplified output, d) a photodetector coupled to the SOA amplified output and having an output, and e) a coupler having an input coupled to the photodetector output and having a first output coupled to the third modulator input and a second output, whereby an amplified RF signal is produced at the OEO RF output. | ||||||
| 172 | SELF INJECTION LOCKED PHASE LOCKED LOOPED OPTOELECTRONIC OSCILLATOR | US13760767 | 2013-02-06 | US20140186045A1 | 2014-07-03 | Ajay Kumar Poddar; Ulrich L. Rohde; Afshin S. Daryoush |
| Aspects of the disclosure relate generally to a circuit for sustaining an radio frequency (RF) modulated optical signal. The circuit may comprise a self injection locking component having a fiber optic delay line over which a portion of the optical signal propagates. The circuit may also comprise a self phase locked loop component having at least two fiber optic cables having different lengths and over which another portion of the optical signal propagates and a phase detector coupled to the at least two fiber optic cables and configured to determine a phase difference between the signals propagating over one of the respective fiber optic cables. The circuit may further comprise a voltage controlled oscillator configured to generate a stable oscillating signal in response to signals generated by each of the self injection locking and self phase locked loop components, the stable oscillating signal being configured to sustain the optical signal. | ||||||
| 173 | Optical-to-millimeter wave conversion | US12739524 | 2008-09-30 | US08726317B2 | 2014-05-13 | David W. Nippa; Richard W. Ridgway |
| A method of converting a modulated optical signal to an encoded electrical signal is provided. The method utilizes a device comprising an electrooptic sideband generator, an optical filter, and an optical/electrical converter. Initially, the modulated optical signal, which carries encoded optical data, is directed to an optical input of the electrooptic sideband generator. The electrooptic sideband generator is driven to generate frequency sidebands about a carrier frequency of the input optical signal. The optical filter is utilized to discriminate between the frequency sidebands and the carrier frequency and combine sidebands-of-interest to yield at least one frequency-converted optical signal comprising a millimeter wave modulation frequency. The frequency converted optical signal carries the encoded optical data and the modulation frequency is a function of the spacing of the sidebands-of-interest. The frequency-converted optical signal is directed to the optical/electrical converter where it is converted to an encoded electrical signal. Additional embodiments are disclosed and claimed. | ||||||
| 174 | Time-domain gated filter for RF communication systems | US13862202 | 2013-04-12 | US08706784B2 | 2014-04-22 | Jason T. Chou; Todd S. Rose; Joshua A. Conway |
| A time domain filter receives a double sideband (DSB) input in the frequency domain and compresses this input into a time domain signal filtered by a time gate for providing a time filtered signal that is then expanded back into the frequency domain as a single sideband (SSB) output with one sideband being filtered by the time gate for translating DSB signals into SSB signals well suited for communicating chirped modulated signals as SSB signals along an electrical line or optical fiber without dispersive nulling of the communicated signal. | ||||||
| 175 | Reconfigurable Liquid Metal Fiber Optic Mirror | US14027262 | 2013-09-16 | US20140105554A1 | 2014-04-17 | Ross Schermer; Carl A. Villarruel; Frank Bucholtz; Colin McLaughlin |
| A true time delay system for optical signals includes a hollow core optical waveguide, a droplet of reflective liquid metal disposed in the hollow core, and an actuator coupled to a first end of the waveguide to move the droplet longitudinally within the hollow core. In one example, the waveguide is a hollow core photonic bandgap fiber. In one example, the actuator is a pressure actuator that introduces or removes gas into the core. Light enters the optical fiber, is transmitted through the fiber toward the reflective surface of the droplet, and is reflected back through the fiber and exits at the same end of the photonic bandgap optical fiber that it entered. The fiber optic device can provide a continuously-variable optical path length of over 3.6 meters (corresponding to a continuously-variable true-time delay of over 12 ns, or 120 periods at a 10 GHz modulation frequency), with negligible wavelength dependence across the C and L bands. | ||||||
| 176 | Method and device for processing terahertz waves | US12936565 | 2009-02-03 | US08693896B2 | 2014-04-08 | Ingo Breunig; Karsten Buse; Jens Kiessling; Bastian Knabe; Rosita Sowade |
| A method for processing received electromagnetic radiation includes receiving electromagnetic radiation having a plurality of carrier waves in the frequency range between 0.1 and 10 terahertz and having modulated onto the carrier waves information with a signal frequency of less than 50 GHz. The received radiation is filtered with a filter that is tunable in the frequency range from 0.1 to 10 terahertz so as to obtain at least one carrier wave as a terahertz signal. The terahertz signal is provided to a detection circuit that is sensitive to the terahertz signal frequency. | ||||||
| 177 | ACTIVE OPTICAL ANTENNA, MICROWAVE TRANSMITTING SYSTEM AND INFORMATION SENDING METHOD | US14012742 | 2013-08-28 | US20140010547A1 | 2014-01-09 | Limin Dong; Kun Li; Jun Cai |
| Embodiments of the present disclosure disclose an active optical antenna, a microwave transmitting system and an information sending method. The active optical antenna includes: a substrate; a ground disposed at the bottom of the substrate; a power supply grid and several antenna units that are disposed at the top of the substrate, and photodetector tubes that are disposed in the substrate and located between the antenna units and the ground, where the power supply grid supplies power to the photodetector tubes, the number of the photodetector tubes is equal to the number of the antenna units, and output ends of the photodetector tubes are coupled with the antenna units to output radio frequency signals; and optical waveguides which are disposed in the substrate and connected to the photodetector tubes. | ||||||
| 178 | Method and apparatus for synthesizing ultra-wide bandwidth waveforms | US12960085 | 2010-12-03 | US08543009B2 | 2013-09-24 | Jean-Paul Bulot; Matthew J. Klotz |
| In accordance with various aspects of the disclosure, a method and apparatus is disclosed for increasing waveform bandwidth of an optical frequency waveform during optical double sideband suppressed carrier modulation. An optical modulator is configured to operate in double sideband, suppressed carrier modulation (DSB-SC) mode producing multiple optical sidebands and optical sideband harmonics. Proper selection of the appropriate optical harmonic via optical filter enables the synthesis of ultra-wideband single-sideband, suppressed carrier (SSB-SC) optical waveforms while simultaneously simplifying the radio frequency (RF) circuitry that generates the modulating radio frequency waveform. | ||||||
| 179 | TIME-DOMAIN GATED FILTER FOR RF COMMUNICATION SYSTEMS | US13862202 | 2013-04-12 | US20130235443A1 | 2013-09-12 | Jason T. Chou; Todd S. Rose; Joshua A. Conway |
| A time domain filter receives a double sideband (DSB) input in the frequency domain and compresses this input into a time domain signal filtered by a time gate for providing a time filtered signal that is then expanded back into the frequency domain as a single sideband (SSB) output with one sideband being filtered by the time gate for translating DSB signals into SSB signals well suited for communicating chirped modulated signals as SSB signals along an electrical line or optical fiber without dispersive nulling of the communicated signal. | ||||||
| 180 | RF communications device including an optical link and related devices and methods | US13189727 | 2011-07-25 | US08515285B2 | 2013-08-20 | Richard DeSalvo; Charles Middleton; Peter S. Scheuter; Gus W. Deibner |
| A communications device includes a transmitter device including an optical source configured to generate an optical carrier signal, and a modulator coupled to the optical source and configured to modulate the optical carrier signal with an input signal having a first frequency, an optical waveguide coupled to the transmitter device, and a receiver device coupled to the optical waveguide. The receiver device includes an optical splitter, a first waveguide path coupled to the optical splitter and configured to filter a sideband from the modulated optical carrier signal, a second waveguide path coupled to the optical splitter and configured to generate a selected sideband from selectable sidebands based upon the modulated optical carrier signal, and an optical-to-electrical converter coupled to the first and second waveguide paths and configured to generate an output signal including a replica of the input signal at a second frequency based upon the selected sideband. | ||||||
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