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公开(公告)号：WO2023049139A1
公开(公告)日：2023-03-30
申请号：PCT/US2022/044177
申请日：2022-09-21
Applicant: RAYTHEON COMPANY
Inventor： HARTIN, Paul T. , SPARIOSU, Kalin , PATRIZI, Michael R.
Abstract: A synthesizer is provided having a controller configured to receive a first signal. A digital-to-analog converter (DAC) is coupled to the controller and configured to generate a voltage bias based on the first signal. The voltage bias corresponds to a target resonant frequency. A semiconductor laser is coupled to the DAC and configured to receive a second signal tone. The semiconductor laser generates a plurality of tone signals having octave multiples of a base sub-harmonic tone of the second signal tone.
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公开(公告)号：WO2022251057A1
公开(公告)日：2022-12-01
申请号：PCT/US2022/030246
申请日：2022-05-20
Applicant: RAYTHEON COMPANY
Inventor： SPARIOSU, Kalin , HARTIN, Paul T. , PATRIZI, Michael R.
Abstract: A synthesizer includes a first resonator mirror, a second resonator mirror, and a gain medium disposed within a laser resonator cavity defined by the first resonator mirror and the second resonator mirror. The synthesizer includes a saturable absorber operationally coupled to the gain medium and having active control such that the saturable absorber is configured to generate a waveform via an injection locking signal to create a mode locking effect, the waveform having a frequency comb defined by dimensions of the gain medium. The synthesizer also includes a crystal electro-optical modulator disposed within the laser resonator cavity. The waveform passes through the modulator to impinge on a photodiode to output an emission RF waveform. Changing the voltage applied to the modulator changes the index of refraction of the modulator, altering an optical path length of the laser resonator cavity to adjust a frequency of the emission RF waveform.
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公开(公告)号：WO2019094509A1
公开(公告)日：2019-05-16
申请号：PCT/US2018/059684
申请日：2018-11-07
Applicant: RAYTHEON COMPANY
Inventor： TONG, Tuan M. , MCGEHEE, Willam K. , PATRIZI, Michael R.
Abstract: A signal generator. A voltage controlled oscillator generates a signal that is fed to a comb generator, e.g., a nonlinear transmission line. A tone, from among a comb of tones at the output of the comb generator, is selected by a bandpass filter, its frequency is divided, e.g., by a direct digital synthesizer, and the result is compared, e.g., by a phase and frequency detector that receives a reference signal at its other input. The output of the phase and frequency detector is fed back, e.g., through a lowpass filter, to the voltage controlled oscillator.
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公开(公告)号：EP3403331A1
公开(公告)日：2018-11-21
申请号：EP16813181.1
申请日：2016-11-30
Applicant: Raytheon Company
Inventor： PATRIZI, Michael R. , FRANCIS, Nathan R. , KOETH, Matthew J.
CPC classification number: H03L7/1075 , G01H1/00 , G01P15/00 , H03L1/00 , H03L7/00 , H03L7/093 , H03L7/099
Abstract: The present disclosure is directed towards systems and method for actively tuning a phase locked loop based on vibration excitation levels experienced by the phase locked loop. A bandwidth of the phase locked loop can be actively increased or decreased based upon a detected vibration level. In an embodiment, the phase locked loop includes a controllable oscillator, an output module, a filter module and a detector. The filter module can be configured to receive a bandwidth control signal to modify a bandwidth of the phase locked loop based on a vibration signal. In an embodiment, the vibration signal corresponds to a vibration level experienced by the phased locked loop. The detector can be configured to receive a PLL output signal from the output module and to receive a PLL input signal.
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