Patents by Inventor Michael H. Myers

Michael H. Myers has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20020191271
    Abstract: A generic optical modulator includes a first inteferometer receiving a first control signal and a second interferometer receiving a second control signal, and each receive a portion of an incoming light signal. The output of the first interferometer is attached to the output of the second interferometer after that output has passed through a phase shifter. A coupler receives the output of the first interferometer and the second interferometer and generates a modulated signal therefrom.
    Type: Application
    Filed: May 23, 2002
    Publication date: December 19, 2002
    Inventor: Michael H. Myers
  • Publication number: 20020181831
    Abstract: A particular signal from a legacy photonic source may have a distribution of wavelengths in a particular signal that is excessively broad for modern, narrowband equipment. In order to provide a drop-in apparatus for integrating modem narrowband signal carrying and handling devices with legacy equipment as either sender or receiver, various implementations of a data stabilizer are provided. Data stabilizers may rely on information transfer mechanisms, signal directors, wavelength shifters, cross-gain modulation, cross-phase modulation, and four-wave mixers. Moreover, data stabilizers may be implemented directly as multiplexers, or integrated into systems using conventional multiplexers.
    Type: Application
    Filed: June 1, 2001
    Publication date: December 5, 2002
    Inventors: Michael H. Myers, Clark C. Guest
  • Publication number: 20020181081
    Abstract: A dynamically optimized photonic waveshifting multiplexer apparatus receives a photonic signal of a first wavelength and bandwidth, and outputs a photonic signal of a second stabilized wavelength and bandwidth. The apparatus measures selected photonic signal parameters dynamically and extracts signal quality information therefrom. This signal quality information is used for self-calibration and to optimize and control signal quality of the photonic output signal.
    Type: Application
    Filed: April 5, 2002
    Publication date: December 5, 2002
    Inventors: Michael H. Myers, Richard S. Johnston, Charles David Melville
  • Publication number: 20020150171
    Abstract: An apparatus and method for generating an envelope predistorted radio frequency signal which avoids undesirable spurious emissions. A complex baseband signal, having an in-phase component I and a quadrature component Q, is sampled and filtered in a sampling circuit and filter circuit to obtain samples Ik of the in-phase component and samples Qk, the quadrature component. The magnitude xk of each sample pair is determined in a first calculation circuit. An amplitude and phase distortion factor Dk, based on scaled values of the archyperbolic tangent and the hyperbolic tangent of the baseband sample magnitude is determined in further calculation circuit and a multiplier. Each sample Ik of the in-phase component and Qk of the quadrature component is multiplied by the corresponding distortion factor Dk, and the resulting predistorted components combined and upconverted to provide a predistorted baseband signal which is amplified in a power amplifier having hyperbolic tangent distortion.
    Type: Application
    Filed: April 16, 2001
    Publication date: October 17, 2002
    Inventor: Michael H. Myers
  • Publication number: 20020131128
    Abstract: An apparatus for wavelength-shift multiplexing narrowband filters a composite photonic signal to provide a narrowband signal. The narrowband filtering operates as a channel selector by isolating the narrowband signal from the composite photonic signal. The narrowband signal may be a full-duplex signal with transmit and receive components. The narrowband signal may be wavelength shifted to provide a channelized photonic signal. The present invention is useful as a building block for photonic transmission, switching and multiplexing. Multiple channelized photonic signals may be combined or separated by the present invention.
    Type: Application
    Filed: August 3, 2001
    Publication date: September 19, 2002
    Inventors: Michael H. Myers, Clark C. Guest
  • Publication number: 20020131124
    Abstract: An apparatus for photonic wavelength shifting and stabilization is described. The apparatus receives a photonic signal, comprised of one or more channels, and provides a wavelength shifted, stabilized, and channelized photonic signal. Data encoding is also supported. A modulation synthesizer provides a modulation waveform embedded with the shifting, stabilization and data encoding mechanisms. A variety of modulation devices are supported. The modulation waveform is optimized for the particular modulation device. A wavelength error detector provides feedback to the modulation synthesizer. The error signal is used to stabilize the photonic signal and correct channel wavelength errors. Fixed wavelength channels and spread spectrum channels are supported.
    Type: Application
    Filed: March 16, 2001
    Publication date: September 19, 2002
    Inventors: Michael H. Myers, Juan C. Riley, Charles D. Melville, Arkady S. Bablumyan, Clark C. Guest
  • Publication number: 20020131526
    Abstract: An apparatus for photonic wavelength shifting and stabilization is described. The apparatus receives a photonic signal, comprised of one or more channels, and provides a wavelength shifted, stabilized, and channelized photonic signal. Data encoding is also supported. A modulation synthesizer provides a modulation waveform embedded with the shifting, stabilization and data encoding mechanisms. A variety of modulation devices are supported. The modulation waveform is optimized for the particular modulation device. A wavelength error detector provides feedback to the modulation synthesizer. The error signal is used to stabilize the photonic signal and correct channel wavelength errors. Fixed wavelength channels and spread spectrum channels are supported.
    Type: Application
    Filed: March 16, 2001
    Publication date: September 19, 2002
    Inventors: Michael H. Myers, Charles D. Melville, Clark C. Guest
  • Publication number: 20020131154
    Abstract: An apparatus and method for photonic channel allocation is described. A photonic signal, comprised of one or more channels, is received, characterized, and assigned to one or more channels. Once assigned the photonic signal is stabilized and wavelength shifted to occupy one or more channels on the photonic output signal. A modulation synthesizer provides a modulation waveform embedded with the shifting, stabilization and data encoding mechanisms. A variety of modulation devices and techniques are supported. The modulation waveform is optimized for the particular modulation device or technique. A wavelength error detector provides feedback to the modulation synthesizer. The error signal is used to stabilize the photonic signal and correct channel wavelength errors. Fixed wavelength channels and spread spectrum channels are supported.
    Type: Application
    Filed: March 16, 2001
    Publication date: September 19, 2002
    Inventors: Bruce E. Smith, Michael H. Myers, Clark C. Guest
  • Publication number: 20020131127
    Abstract: An apparatus for coherent wavelength-shift multiplexing splits a photonic signal of limited coherence length into a plurality of daughter signals. Each daughter signal is modulated with a modulation waveform configured to shift the wavelength of the photonic input signal and provide a photonic output signal with a unique wavelength pattern corresponding to a channel. Each photonic output signal corresponding to a data channel is also encoded with a data signal by pre-modulating the modulation waveform. Wavelength errors are detected to provide a wavelength error signal. The wavelength error signal is used to adjust the modulation waveforms to stabilize the wavelength of the photonic output signals and correct channel wavelength errors. Fixed wavelength channels and spread spectrum channels are supported by the present invention. The photonic output signals are combined onto a single medium to provide a multiplexed photonic signal.
    Type: Application
    Filed: August 3, 2001
    Publication date: September 19, 2002
    Inventor: Michael H. Myers
  • Publication number: 20020131100
    Abstract: Detecting photonic wavelength errors relies on wavelength shifting a photonic signal comprised of one or more channels. The photonic signal is wavelength shifted by slightly offset shift values to provide a pair of photonic signals with slightly offset wavelengths. The pair of photonics signals is filtered and differentially compared to provide a wavelength error signal.
    Type: Application
    Filed: September 13, 2001
    Publication date: September 19, 2002
    Inventors: Michael H. Myers, John N. Hait, Steven F. McDaniel
  • Publication number: 20020131155
    Abstract: An apparatus and method for recursive wavelength shifting is described. A photonic signal, comprised of one or more channels, is received, recursively wavelength shifted and filtered to provide a photonic spectrum. The spacing between repeating portions of the photonic spectrum is controlled with a shift signal. One or more output filters select a portion of the photonic spectrum and provide an photonic output signal corresponding thereto. Wavelength shifting is performed with a variety of modulation devices or techniques. Recursive wavelength shifting increases the wavelength shifting attainable with limited bandwidth modulation signals.
    Type: Application
    Filed: March 16, 2001
    Publication date: September 19, 2002
    Inventor: Michael H. Myers
  • Publication number: 20020131126
    Abstract: An apparatus for photonic transceiving spectrally replicates a photonic input signal to provide a replicated photonic signal. The replicated photonic signal contains multiple copies of the photonic input signal shifted to various wavelengths. The replicated photonic signal is then filtered to provide a photonic output signal within a desired passband. The photonic input signal may be spectrally replicated through a variety of mechanisms including four-wave mixing, modulation via a harmonically rich modulation waveform, recursive wavelength shifting and complementary recursive wavelength shifting.
    Type: Application
    Filed: June 1, 2001
    Publication date: September 19, 2002
    Inventors: Michael H. Myers, Juan C. Riley, Clark C. Guest
  • Publication number: 20020131140
    Abstract: An apparatus for stabilized photonic transmission is described. A light source of limited coherence length is wavelength shifted, stabilized, and data encoded to provide a stabilized photonic signal. A modulation synthesizer provides a modulation waveform embedded with the shifting, stabilization and data encoding mechanisms. A variety of modulation devices are supported. The modulation waveform is optimized for the particular modulation device. A wavelength error detector provides feedback to the modulation synthesizer. The error signal is used to stabilize the photonic signal and correct channel wavelength errors. Fixed wavelength channels and spread spectrum channels are supported.
    Type: Application
    Filed: March 16, 2001
    Publication date: September 19, 2002
    Inventors: Michael H. Myers, Juan C. Riley, Charles D. Melville
  • Publication number: 20020130251
    Abstract: An apparatus and method for detecting photonic wavelength errors is described. A photonic signal comprised of one or more channels is received. The photonic signal is wavelength shifted by a pair of wavelength shifters with slightly offset shift values to provide a pair of photonic signals with slightly offset wavelengths. The pair of photonics signals is filtered and differentially compared to provide a wavelength error signal.
    Type: Application
    Filed: March 16, 2001
    Publication date: September 19, 2002
    Inventors: Michael H. Myers, John N. Hait, Steven McDaniel
  • Publication number: 20020131527
    Abstract: A method for photonic wavelength shifting and stabilization is described. The method receives a photonic signal, comprised of one or more channels, and provides a wavelength shifted, stabilized, and channelized photonic signal. Data encoding is also supported. A modulation synthesizer provides a modulation waveform embedded with the shifting, stabilization and data encoding mechanisms. A variety of modulation techniques are supported. The modulation waveform is optimized for the particular modulation technique. A wavelength error detector provides feedback to the modulation synthesizer. The error signal is used to stabilize the photonic signal and correct channel wavelength errors. Fixed wavelength channels and spread spectrum channels are supported.
    Type: Application
    Filed: March 16, 2001
    Publication date: September 19, 2002
    Inventors: Michael H. Myers, Charles D. Melville, Clark C. Guest
  • Publication number: 20020131125
    Abstract: A method for photonic transceiving spectrally replicates a photonic input signal to provide a replicated photonic signal. The replicated photonic signal contains multiple copies of the photonic input signal shifted to various wavelengths. The replicated photonic signal is then filtered to provide a photonic output signal within a desired passband. The photonic input signal may be spectrally replicated through a variety of mechanisms including four-wave mixing, modulation with a harmonically rich modulation waveform, recursive wavelength-shifting and complementary recursive wavelength-shifting.
    Type: Application
    Filed: June 1, 2001
    Publication date: September 19, 2002
    Inventors: Michael H. Myers, Juan C. Riley, Clark C. Guest
  • Publication number: 20020101941
    Abstract: A compensation circuit for phase modulation systems, such as QPSK and QAM systems, which compensates for phase errors in the I and Q components of the QPSK or QAM signals to minimize carry over of such phase errors in analog up and down conversions of such signals. In particular, the invention relates to a relatively simple circuit, which compensates for channel phase errors by providing a direct correction of one of the channels based on the measured correlation between the I and Q components, which should ideally be 0. As such, cross talk between I-Q channels is minimized, which improves the signal-to-noise ratio of transmitted and received QPSK or QAM signals.
    Type: Application
    Filed: December 14, 2000
    Publication date: August 1, 2002
    Inventor: Michael H. Myers
  • Patent number: 6407846
    Abstract: A method for photonic wavelength shifting and stabilization is described. The method receives a photonic signal, comprised of one or more channels, and provides a wavelength shifted, stabilized, and channelized photonic signal. Data encoding is also supported. A modulation synthesizer provides a modulation waveform embedded with the shifting, stabilization and data encoding mechanisms. A variety of modulation techniques are supported. The modulation waveform is optimized for the particular modulation technique. A wavelength error detector provides feedback to the modulation synthesizer. The error signal is used to stabilize the photonic signal and correct channel wavelength errors. Fixed wavelength channels and spread spectrum channels are supported.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: June 18, 2002
    Assignee: All Optical Networks, Inc.
    Inventors: Michael H. Myers, Juan C. Riley, Charles D. Melville, Arkady S. Bablumyan, Clark C. Guest
  • Publication number: 20020071503
    Abstract: A system for and a method of demodulating a received VHF radio frequency signal, for example on an aircraft, the radio frequency signal including a baseband signal with differential phase shift keying encoded data, to obtain the encoded data. The signal is received by a signal receiver (20), and a symbol tracking select value is determined in a symbol synchronization circuit (22). Doppler error in the received signal is estimated in a Doppler estimator (24). The received signal, the symbol tracking select value, and the estimated Doppler error are applied to a symbol demodulator (32) within which the received signal is multiplied in a multiplier (42) by a signal at a frequency which is the negative of the estimated Doppler error to remove that Doppler error. The resulting signal is filtered and decimated by a decimating low pass filter (48) and normalized by a signal generator (52) which generates the arctangent of the in-phase and quadrature components of the baseband signal.
    Type: Application
    Filed: December 7, 2000
    Publication date: June 13, 2002
    Inventor: Michael H. Myers
  • Publication number: 20020044316
    Abstract: Providing variable grades of service to a plurality of users in a delay domain or coherence multiplexing environment, a method combines non-synchronized, mixed rate channels over a single coherence multiplexed datalink. The power levels of each independent channel may be varied to optimize the performance of the multiplexed system and provide differing grades of service required by independent users and reduce cross-channel interference. Channels of lower data rates may be transmitted at a lower power level to further optimize the total power transmitted across an optical fiber, where the total power into the fiber is held constant. The present invention employs a control module configured to adjust the power levels of the independent channels based on the signal to noise ratio or bit error ratio, data rates required by independent users, the input power level allowed by a fiber, fiber cable loss, detector noise, and laser coherence length.
    Type: Application
    Filed: June 13, 2001
    Publication date: April 18, 2002
    Inventor: Michael H. Myers