子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | Systems and methods for demodulation of free space optical signals without wavefront correction | US15717175 | 2017-09-27 | US09973281B2 | 2018-05-15 | Andrew Kowalevicz; Gary M. Graceffo; Benjamin P. Dolgin |
| Optical signal receivers and methods are provided that include an optical resonator that allows an optical signal to enter and optical signal energy to accumulate at regions inside the optical resonator. A portion of optical signal energy is emitted from among various regions of the optical resonator, such that a combination of the emitted optical signal energy is disturbed when a phase transition occurs in the received optical signal. A detector aligned with the output detects the combined emitted optical signal energy and is configured to detect the disturbance and determine a characteristic of the phase transition in the received optical signal based upon the disturbance. | ||||||
| 82 | Optical up/down conversion-type optical phase conjugate pair signal transmission/reception circuit | US15514529 | 2015-09-02 | US09954615B2 | 2018-04-24 | Takahide Sakamoto |
| To provide a method capable of easily compensating waveform distortion due to a non-linear effect caused by a complicated electric circuit, and a device for implementing the method. Provided are a method capable of effectively compensating signal degradation such as waveform distortion due to a nonlinear effect caused by an optical fiber that is an optical transfer path using an optical phase conjugate signal pair at the time of optical up-conversion or down-conversion, and a device capable of implementing the method. This emission device 25 includes an optical modulator 11, a signal source 13, an optical fiber 15, a multiplexing unit 17, a multiplexing local signal source 19, an optical detector 12, and a transmission antenna 23. | ||||||
| 83 | SYSTEMS AND METHODS FOR DEMODULATION OF PSK MODULATED OPTICAL SIGNALS | US15725457 | 2017-10-05 | US20180102853A1 | 2018-04-12 | Benjamin P. Dolgin; Gary M. Graceffo; Andrew Kowalevicz |
| Optical signal receivers and methods are provided that include first and second optical resonators, each of which receives a portion of an arriving optical signal. The first optical resonator is tuned to a carrier wavelength and accumulates resonant optical signal energy whose output is disturbed responsive to a transition in the arriving optical signal. The second optical resonator is detuned from the carrier wavelength but also exhibits a disturbed output responsive to the transition in the arriving optical signal. Detectors detect the output disturbances from the two optical resonators to determine characteristics of the transition in the arriving optical signal. | ||||||
| 84 | Fiber grating demodulation system for enhancing spectral resolution by finely shifting linear array detector | US15292283 | 2016-10-13 | US09869587B2 | 2018-01-16 | Lianqing Zhu; Wei He; Mingli Dong; Fei Luo; Feng Liu; Xiaoping Lou; Hong Li |
| A fiber grating demodulation system for enhancing spectral resolution by finely adjusting a linear array detector, includes a laser pump source, a wavelength division multiplexer, a fiber Bragg grating, a diaphragm, a slit, a collimating mirror, a light splitting grating, an imaging focus mirror, a linear array detector. The laser pump source, the wavelength division multiplexer, and the fiber Bragg grating are connected in sequence, the wavelength division multiplexer is connected to the diaphragm. Light emitted from the laser pump source is multiplexed by the wavelength division multiplexer and then enters the fiber Bragg grating, and a reflection spectrum of the fiber Bragg grating enters the slit of the fiber grating demodulation system as injected light. After passing through the slit, the injected light is reflected by the collimating mirror, the light splitting grating, the imaging focus mirror in sequence, and is finally converged to the linear array detector. | ||||||
| 85 | Fiber grating demodulation system for enhancing spectral resolution by finely rotating imaging focus mirror | US15292244 | 2016-10-13 | US09683892B2 | 2017-06-20 | Lianqing Zhu; Wei He; Xiaoping Lou; Feng Liu; Mingli Dong; Fei Luo; Wei Zhuang |
| A fiber grating demodulation system for enhancing spectral resolution by finely adjusting an imaging focus mirror, includes a laser pump source, a wavelength division multiplexer, a fiber Bragg grating, a diaphragm, a slit, a collimating mirror, a light splitting grating, an imaging focus mirror, a linear array detector. The laser pump source, the wavelength division multiplexer, the fiber Bragg grating are connected in sequence, the wavelength division multiplexer is connected to the diaphragm. Light emitted from the laser pump source is multiplexed by the wavelength division multiplexer and then enters the fiber Bragg grating, a reflection spectrum of the fiber Bragg grating enters the slit of the fiber grating demodulation system as injected light. After passing through the slit, the injected light is reflected by the collimating mirror, the light splitting grating, and the imaging focus mirror in sequence, and is finally converged to the linear array detector. | ||||||
| 86 | FIBER GRATING DEMODULATION SYSTEM FOR ENHANCING SPECTRAL RESOLUTION BY FINELY ROTATING LIGHT SPLITTING GRATING | US15292330 | 2016-10-13 | US20170108380A1 | 2017-04-20 | Lianqing ZHU; Wei HE; Feng LIU; Mingli DONG; Xiaoping LOU; Wei ZHUANG; Fei LUO |
| A fiber grating demodulation system for enhancing spectral resolution by finely adjusting a light splitting grating, includes a laser pump source, a wavelength division multiplexer, a fiber Bragg grating, a diaphragm, a slit, a collimating mirror, a light splitting grating, an imaging focus mirror, and a linear array detector. The laser pump source, the wavelength division multiplexer, the fiber Bragg grating are connected in sequence, the wavelength division multiplexer is connected to the diaphragm. Light emitted from the laser pump source is multiplexed by the wavelength division multiplexer and then enters the fiber Bragg grating, a reflection spectrum of the fiber Bragg grating enters the slit of the fiber grating demodulation system as injected light. After passing through the slit, the injected light is reflected by the collimating mirror, the light splitting grating, and the imaging focus mirror in sequence, and is finally converged to the linear array detector. | ||||||
| 87 | FIBER GRATING DEMODULATION SYSTEM FOR ENHANCING SPECTRAL RESOLUTION BY FINELY SHIFTING LINEAR ARRAY DETECTOR | US15292283 | 2016-10-13 | US20170108379A1 | 2017-04-20 | Lianqing ZHU; Wei He; Mingli Dong; Fei Luo; Feng Liu; Xiaoping Lou; Hong Li |
| A fiber grating demodulation system for enhancing spectral resolution by finely adjusting a linear array detector, includes a laser pump source, a wavelength division multiplexer, a fiber Bragg grating, a diaphragm, a slit, a collimating mirror, a light splitting grating, an imaging focus mirror, a linear array detector. The laser pump source, the wavelength division multiplexer, and the fiber Bragg grating are connected in sequence, the wavelength division multiplexer is connected to the diaphragm. Light emitted from the laser pump source is multiplexed by the wavelength division multiplexer and then enters the fiber Bragg grating, and a reflection spectrum of the fiber Bragg grating enters the slit of the fiber grating demodulation system as injected light. After passing through the slit, the injected light is reflected by the collimating mirror, the light splitting grating, the imaging focus mirror in sequence, and is finally converged to the linear array detector. | ||||||
| 88 | Snapshot spatial heterodyne imaging polarimetry | US14091190 | 2013-11-26 | US09442015B2 | 2016-09-13 | Michael W. Kudenov; Michael J. Escuti |
| Polarization based channeled images are optically demodulated to produce directly viewable images. A channeled image flux is converted to an unpolarized flux by a phosphor or other sensor, and the resulting converted flux is demodulated by modulating at a spatial frequency corresponding to a modulating frequency of the channeled image flux. After modulation, the converted flux is spatially filtered to remove or attenuate portions associated with the modulation frequency and harmonics thereof. The resulting baseband flux is then imaged by direct viewing, projection, or using an image sensor and a display. | ||||||
| 89 | OPTICALLY EXCITED PHOSPHOR DISPLAY SCREENS HAVING COLORING FILTERING PIGMENTS EMBEDDED IN PHOSPHOR MIXTURES | US14866692 | 2015-09-25 | US20160146433A1 | 2016-05-26 | Sergey A. Bukesov; Louis S. Stuhl |
| Techniques and optically excited light-emitting devices based on phosphors are provided to use phosphor materials which absorb excitation light to emit visible light and include a composite phosphor material including two or more different transition metal compounds that, under optical excitation of the excitation light, emit visible light at spectrally close but different spectral wavelengths or bands that spectrally overlap to produce a desired color. | ||||||
| 90 | OPTICAL FUNCTIONAL INTEGRATED UNIT AND METHOD FOR MANUFACTURING THEREOF | US14764607 | 2013-10-25 | US20150372453A1 | 2015-12-24 | Hiroyuki YAMAZAKI |
| It is provided that an optical functional integrated unit and a method for manufacturing thereof in which a positive optical device and a passive optical device including a silicon waveguide can be readily integrated. An optical functional integrated unit includes a semiconductor optical amplifier, a photonics device, a mounting board, pedestals and. The pedestals and are provided on the mounting board. The semiconductor optical amplifier is mounted on the pedestal and outputs a light from an active layer. The photonics device is mounted on the pedestal. The photonics device includes silicon waveguide to which the light output from the semiconductor optical amplifier is guided. | ||||||
| 91 | Two-dimensional planar lightwave circuit integrated spatial filter array and method of use thereof | US14212822 | 2014-03-14 | US09182648B2 | 2015-11-10 | Jun Ai; Fedor Dimov |
| A large coherent two-dimensional (2D) spatial filter array (SFA), 30 by 30 or larger, is produced by coupling a 2D planar lightwave circuit (PLC) array with a pair of lenslet arrays at the input and output side. The 2D PLC array is produced by stacking a plurality of chips, each chip with a plural number of straight PLC waveguides. A pupil array is coated onto the focal plane of the lenslet array. The PLC waveguides are produced by deposition of a plural number of silica layers on the silicon wafer, followed by photolithography and reactive ion etching (RIE) processes. A plural number of mode filters are included in the silica-on-silicon waveguide such that the PLC waveguide is transparent to the fundamental mode but higher order modes are attenuated by 40 dB or more. | ||||||
| 92 | METHOD AND APPARATUS OF MONITORING AND TRACKING OPTICAL FREQUENCY DIFFERENCES OF MODULATED BEAMS | US14187589 | 2014-02-24 | US20150241218A1 | 2015-08-27 | Tiequn Qiu; Waymon Ho |
| A method of measuring beat frequency comprises modulating a first optical signal and a second optical signal, wherein the first modulated optical signal includes a first carrier frequency and a first plurality of sideband frequencies and the second modulated optical signal includes a second carrier frequency and a second plurality of sideband frequencies. The method also comprises combining a fraction of the first modulated optical signal with a fraction of the second modulated optical signal into a combined signal and determining a carrier beat frequency. The method further comprises selecting a frequency range from the combined signal; performing a fast Fourier transform (FFT) on an electrical signal representing the selected frequency range; tracking the carrier beat frequency based on the FFT; and outputting a rate signal based on the tracked carrier beat frequency, the rate signal indicating a rotation rate of the resonator fiber optic gyroscope. | ||||||
| 93 | Optical analog-to-digital converter, method of constructing the same, optical signal demodulator, and optical modulator-demodulator | US13698018 | 2011-04-28 | US09052534B2 | 2015-06-09 | Shinya Sudo; Kenji Sato |
| An optical A/D converter according to the present invention includes an optical splitter that splits an analog input signal light into plurals, a plurality of Mach-Zehnder interferometers to which each of the signal lights split by the optical splitter is input, and plurality of optical/electrical conversion unit that convert each signal lights output from each Mach-Zehnder interferometer into a digital electrical signal, in which each Mach-Zehnder interferometer includes optical intensity-to-phase conversion unit that optically convert intensity of the input signal light into an amount of phase shift and the amount of phase shift differs for each Mach-Zehnder interferometer. Then, it is possible to provide a high speed and low power consuming optical demodulation circuit. | ||||||
| 94 | Modulated signal detecting apparatus and modulated signal detecting method | US13817952 | 2012-08-16 | US09042002B2 | 2015-05-26 | Kiyotaka Ito; Yasumori Hino |
| A phase difference error detecting unit detects a phase difference error component included in a phase difference component; a phase difference correcting unit corrects a first signal having the phase difference component as an angle of a cosine function and a second signal whose angle of the cosine function differs from that of the first signal by approximately π/2 based on the detected phase difference error component; a phase operating unit operates a phase difference component from the first signal and the second signal corrected by the phase difference correcting unit; and the phase difference correcting unit obtains the corrected first signal and the corrected second signal by rotating a coordinate point represented by the first signal and the second signal on a polar coordinate plane by an angle corresponding to the phase difference error component. | ||||||
| 95 | Method for optical frequency synthesis | US14294217 | 2014-06-03 | US09036670B2 | 2015-05-19 | Yuriy Mayzlin |
| A method for generation of electromagnetic radiation has the following method steps: generation of electromagnetic radiation at a useful frequency, division of the electromagnetic radiation into a useful beam and a secondary beam, frequency shift of the electromagnetic radiation of the secondary beam, control of the useful frequency as determined by a manipulated variable, wherein the manipulated variable is derived from the frequency-shifted radiation of the secondary beam. | ||||||
| 96 | METHOD FOR OPTICAL FREQUENCY SYNTHESIS | US14294217 | 2014-06-03 | US20140355631A1 | 2014-12-04 | Yuriy MAYZLIN |
| A method for generation of electromagnetic radiation has the following method steps: generation of electromagnetic radiation at a useful frequency, division of the electromagnetic radiation into a useful beam and a secondary beam, frequency shift of the electromagnetic radiation of the secondary beam, control of the useful frequency as determined by a manipulated variable, wherein the manipulated variable is derived from the frequency-shifted radiation of the secondary beam. | ||||||
| 97 | Interferometer, demodulator, and optical communication module | US12985385 | 2011-01-06 | US08861982B2 | 2014-10-14 | Hideharu Mikami; Taichi Kogure |
| When designing a demodulator for a DPSK-modulated signal, it is required that optical phase modulation is performed fast and the demodulator has a long lifetime. To achieve this object, a delay line interferometer inside the demodulator performs adjustment of phase difference between two split lights caused to interfere, using a first optical phase modulation unit such as a Piezo actuator and a second optical phase modulation unit such as a heating element that operates slower in modulation speed than the first optical phase modulation unit and is slower in deterioration speed. | ||||||
| 98 | PLC-TYPE DELAY DEMODULATION CIRCUIT | US13841672 | 2013-03-15 | US20130208348A1 | 2013-08-15 | Hiroshi Kawashima; Kazutaka Nara |
| A PLC-type delay demodulation circuit includes a planar lightwave circuit that is provided on one PLC chip and demodulates a DQPSK signal. The planar lightwave circuit includes a Y-branch waveguide that branches a DQPSK-modulated optical signal into two optical signals and first and second MZIs that delay the branched optical signals by one bit. The length of a short arm waveguide of the first MZI is different from the length of a short arm waveguide of the second MZI, and the length of an optical path from the Y-branch waveguide to output ports of the first MZI through the short arm waveguide of the first MZI is equal to that of an optical path from the Y-branch waveguide to output ports of the second MZI through the short arm waveguide of the second MZI. | ||||||
| 99 | Optical differential phase-shift keyed signal demodulator | US13534276 | 2012-06-27 | US08411351B2 | 2013-04-02 | Kevin McCallion; Xueyan Zheng |
| A phase-shift keyed signal demodulator and method for demodulating is disclosed. An example demodulator includes N filters that receive inputs from a splitter and include transmission functions offset from one another. N pairs of photodiodes receive the transmitted and reflected beams from each filter and a decoder converts the outputs of the pairs of photodiodes to one or more data symbols. | ||||||
| 100 | Generation of single optical tone, RF oscillation signal and optical comb in a triple-oscillator device based on nonlinear optical resonator | US13472420 | 2012-05-15 | US20120294319A1 | 2012-11-22 | Lute Maleki; Andrey Matsko |
| Techniques and devices based on optical resonators made of nonlinear optical materials to form triple-oscillator devices for generating a single optical tone, a radio frequency (RF) oscillation signal and an optical frequency comb signal having different optical frequencies. | ||||||
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