| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Optical digital-analog converter | JP3939880 | 1980-03-26 | JPS56135827A | 1981-10-23 | DAIMON MASAHIRO |
| PURPOSE:To enable superhigh-speed conversion with simple constitution by directly converting optical digital signals coded by a binary system into an optical analog signal. CONSTITUTION:The signal of optical fiber 1a is allowed to correspond to bit 4, that of optical fiber 1b to bit 3, that of optical fiber 1c to bit 2, and that of optical fiber 1d to bit 1. The signals are introduced into line collector 8 through light attenuators 6a-6d having predetermined different attenuating factors, and by adding the signals, an optical analog signal is given to optical fiber 5. | ||||||
| 142 | Digital controlled optical strength modulator | JP6719780 | 1980-05-22 | JPS55155323A | 1980-12-03 | JIYAN KUROODO ANNU; MISHIERU POOSHIYON; KUROODO PUUSHIYU |
| 143 | High-speed analog-to-digital converter | US15658069 | 2017-07-24 | US10139704B1 | 2018-11-27 | Bishara Shamee; Steven R. Wilkinson; Makan Mohageg |
| A high-speed analog-to-digital converter can produce a digital signal representative of an analog input electrical signal. An optical amplitude modulator can modulate an input optical pulse train using the analog input electrical signal. An optical splitter can split the modulated optical pulse train into a plurality of modulated optical pulse trains. Optical path delays can stagger in time the modulated optical pulse trains to form a plurality of time-staggered modulated optical pulse trains. Demodulators can detect and filter the time-staggered modulated optical pulse trains to form a respective plurality of time-averaged voltages. Analog-to-digital converters can output a respective plurality of digital time series representative of the respective time-averaged voltages. An interleaver can aggregate the plurality of digital time series to form the digital signal, which has a sample rate greater than a repetition rate of the input optical pulse train. | ||||||
| 144 | Analog-to-digital converter using a timing reference derived from an optical pulse train | US15658048 | 2017-07-24 | US10135541B1 | 2018-11-20 | Bishara Shamee; Steven R. Wilkinson; Makan Mohageg |
| An analog-to-digital converter can produce a digital signal representative of an analog input electrical signal. An optical amplitude modulator can modulate an input optical pulse train using the analog input electrical signal to produce a first modulated optical pulse train. An optical splitter can split the first modulated optical pulse train into a plurality of modulated optical pulse trains. A plurality of detectors can convert the plurality of modulated optical pulse trains into respective modulated voltage pulse trains. A plurality of comparators and a decoder, arranged in a flash converter topology, can receive the modulated voltage pulse trains and output the digital signal representative of the analog input electrical signal using a timing reference derived from the input optical pulse train. Using a relatively high-precision input optical pulse train, such as a Kerr Comb, can produce a relatively high-accuracy analog-to-digital converter. | ||||||
| 145 | Optical quantizer | US15554300 | 2016-02-16 | US09989784B2 | 2018-06-05 | Tsuyoshi Konishi |
| An optical quantizer including: a first shaping unit which performs at least intensity modulation of the sampling optical pulses using an analog signal to generate first optical pulses having a spectrum in which intensity is flat in a spectrum axis direction; a second shaping unit which performs spectrum shaping of the sampling optical pulses to generate second optical pulses having a spectrum in which intensity increases or decreases monotonously in the spectrum axis direction; a phase shifter which shifts a phase of optical pulses input to one of the first shaping unit and the second shaping unit so that a phase difference between the first optical pulses and the second optical pulses becomes a predetermined phase difference; an interference device which causes interference between the first optical pulses and the second optical pulses; and a wavelength demultiplexer which demultiplexes optical pulses output from the interference device into light of wavebands. | ||||||
| 146 | Controllable opto-electronic time stretcher, an electro-optical analog to digital converter having non-uniform sampling using the same, and related methods of operation | US15220190 | 2016-07-26 | US09841658B1 | 2017-12-12 | Willie W. Ng; Mohiuddin Ahmed; Troy Rockwood |
| A controllable opto-electronic time stretcher comprising a first wave guide and a second waveguide coupled to the first waveguide along a coupling portion; wherein at least one of the first and second waveguides in the coupling portion has a controllable refractive index. | ||||||
| 147 | Differential voltage-mode integrate and dump photonic analog to digital converter (pADC) | US15482498 | 2017-04-07 | US09835931B1 | 2017-12-05 | Altin E. Pelteku |
| A voltage-mode integrate-and-dump photonic ADC front-end circuit includes a current integrator for immediately integrating current pulses onto a capacitor voltage, the current pulses converted by photodetectors from optical data pulses corresponding to a received analog input signal. The circuit may include dampeners for reducing voltage ringing and resulting intersymbol interference (ISI) to preserve SNR at high data rates. The integrating capacitor may be discharged by a reset switch based on clock signals generated by a master clock; the reset switch may include a pulse width controller enabling the integrating capacitor to track and hold the integrated voltage, rather than downstream sample-and-hold amplifiers. Quantizers and other signal processors generate digital signal output by sampling and digitizing the integrated voltage output of the current integrator. | ||||||
| 148 | ANALOG TO DIGITAL CONVERTER | US15637846 | 2017-06-29 | US20170302290A1 | 2017-10-19 | Yu Cai; Chunhui Zhang; Jifang He |
| The present embodiments provide an analog to digital converter, including a beam splitter, M photodetectors, M amplifier modules, and an encoder. Each output end of the beam splitter is corresponding to an input end of a photodetector, an output end of each photodetector is connected to an input end of an amplifier module, and an output end of each amplifier module is connected to an input end of the encoder. The beam splitter splits an inputted analog optical signal into M optical signals, outputs each optical signal to a corresponding photodetector to convert each optical signal into a current signal, inputs each current signal to a corresponding amplifier module to generate an output voltage, and outputs the output voltage to a corresponding input end of the encoder. | ||||||
| 149 | Analogue-digital converter and method for generating a digital data stream | US14778252 | 2014-03-18 | US09753354B2 | 2017-09-05 | Martin Schell |
| An analog-digital converter has an optical input stage configured to convert an analog input signal (S(t)) into a phase-modulated optical signal and to supply it to a hybrid coupler having a plurality of output waveguides, each being connected to at least one photodiode. The photodiodes are each connected to the input of an associated analog-digital converter via which an analog electrical input signal is convertible into a digital output signal. An output stage is configured to form the digital data stream at the output from the digital output signals of the analog-digital converter, and the output stage may be configured to select the output signal of the analog-digital converter which lies within a predefinable range of the amplitude and has a predefinable slope and/or is larger than a predefinable adjacent output signal. | ||||||
| 150 | System and method for producing optical sinc-shaped pulses | US14704125 | 2015-05-05 | US09395535B2 | 2016-07-19 | Thomas Schneider; Camille-Sophie Brés; Luc Thévenaz; Marcelo Alfonso Soto Hernandez; Mohammad Mehdi Alem Karladani; Mohammad Amin Shoaie; Armand Vedadi-Comte |
| System and methods for producing a plurality of Sinc shaped pulses in the time domain include a light source for providing an input light signal having an input frequency, and at least one spectrum shaper for producing the plurality of Sinc shaped pulses from the input light signal. The spectrum shaper may include an amplitude modulator, at least one radio-frequency generator and a bias voltage generator. | ||||||
| 151 | Configurable time-interleaved analog-to-digital converter | US14771835 | 2014-03-07 | US09350374B2 | 2016-05-24 | Rolf Sundblad; Robert Hägglund; Staffan Holmbring |
| A time-interleaved analog-to-digital converter for conversion of L analog input signals to L corresponding digital output signals comprises an array of N (N>L) constituent analog-to-digital converters each having an analog input and a digital output and each adapted to digitize an analog input sample, and a controller adapted to (for each of the L analog input signals indexed by i=1, 2, . . . , L) select a number Ni, of constituent analog-to-digital converters from the array of N constituent analog-to-digital converters (wherein Ni≧1 and Σi=1L Ni≦N), and cause each sample of the analog input signal to be digitized in a respective one of the selected Ni, constituent analog-to-digital converters. The analog-to-digital converter also comprises a multiplexer adapted to (for each of the L analog input signals) multiplex the digitized samples of each of the selected Ni constituent analog-to-digital converters to produce the digital output signal. | ||||||
| 152 | Linearized optical digital-to-analog modulator | US14662343 | 2015-03-19 | US09203425B2 | 2015-12-01 | Yossef Ehrlichman; Ofer Amrani; Shlomo Ruschin |
| A modulator device for converting digital data into modulation of an optical signal includes an electronic input for receiving an input data word of N bits and an electrically controllable modulator for modulating the intensity of an optical signal, the modulator including M actuating electrodes where M≧N. An electrode actuating device, most preferably a digital-to-digital convertor, operates actuating electrodes so that at least one electrode is actuated as a function of values of more than one bit of the input data word. According to an alternative, or supplementary, aspect of the invention, the set of electrodes includes at least one electrode having an effective area which is not interrelated to others of the set by factors of two. In one preferred implementation, a Mach-Zehnder modulator also provides phase modulation to give QAM functionality. Another implementation employs a semiconductor laser. | ||||||
| 153 | Photonic analog-to-digital converter | US14698087 | 2015-04-28 | US09201287B1 | 2015-12-01 | Geoff W. Taylor |
| A photonic analog-to-digital converter is provided that includes a tunable light source, an optical sampling clock source, an optical splitter and a plurality of optical signal processing channels. The tunable light source produces an optical signal at a variable wavelength corresponding to analog levels of an electrical input signal. The optical sampling clock source produces an optical sampling clock signal that defines a sequence of sampling periods. The optical splitter is operably coupled to the tunable light source. The optical splitter splits the optical signal produced by the tunable light source for supply to the plurality of optical signal processing channels. Each one of the optical signal processing channels includes a photonic filter and corresponding optoelectronic thyristor comparator that is operably coupled to the optical sampling clock source. The optoelectronic thyristor comparator operates as a discriminator that generates a digital electrical signal representing whether the optical signal produced by the tunable light source has a wavelength that lies within a predetermined wavelength quantization level during the sampling periods defined by the optical sampling clock source. The photonic analog-to-digital converter further includes circuitry that generates a digital word corresponding to the digital electrical signals generated by the optoelectronic thyristor comparators of the plurality of optical signal processing channels. | ||||||
| 154 | OPTICAL ANALOG TO DIGITAL CONVERTER AND METHOD | US14588511 | 2015-01-02 | US20150261065A1 | 2015-09-17 | Piergiorgio SARTOR; Klaus ZIMMERMANN |
| An optical analog to digital converter including a light source, a driver, an array of single photon avalanche diodes, and control circuitry. The light source emits photons. The driver receives an analog input signal and to drive the light source on the basis of the analog input signal. The array of single photon avalanche diodes detects the photons provided by the light source. The control circuity is coupled to the array of single photon avalanche diodes and activates the array of single photon avalanche diodes for a predetermined time interval such that the array of single photon avalanche diodes detects the photons provided by the light source during the predetermined time interval. The control circuity further determines the number of single photon avalanche diodes of the array of single photon avalanche diodes which detected a photon during the predetermined time interval. | ||||||
| 155 | ANALOG-DIGITAL CONVERTER | US14405760 | 2013-06-05 | US20150180494A1 | 2015-06-25 | Kenichi Ohhata |
| A parallel-type AD converter includes: a plurality of comparators that receive comparison reference potentials different from one another and compare the comparison reference potentials and received analog input signals; an encoder that encodes outputs of the plurality of comparators to output digital signals; and a resistor ladder circuit that resistance-divides a reference voltage to generate the comparison reference potentials and supplies the comparison reference potentials to the comparators through output nodes each positioned between resistors, and is designed to supply a correction current corresponding to noise currents that the comparators generate to the output nodes of the comparison reference potentials in the resistor ladder circuit, and thereby the noise currents that the comparators generate are offset by the correction current, a bias current in the resistor ladder circuit can be decreased, and accuracy deterioration in AD conversion can be suppressed. | ||||||
| 156 | 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. | ||||||
| 157 | SAMPLING DEVICE WITH TIME-INTERLEAVED OPTICAL CLOCKING | US14398123 | 2013-04-23 | US20150130513A1 | 2015-05-14 | Oliver Landolt |
| A sampling device comprising a first input port and a second input port, wherein an input-signal is fed to the first input port and wherein an optical clock signal is fed to the second input port. The sampling device comprises a plurality of track and hold units, wherein each of the plurality of track and hold units is connected to the first input port. The plurality of the track and hold units is further connected to the second input port through an optical waveguide in such a manner that the plurality of tack and hold units operate in a time-interleaved mode. | ||||||
| 158 | System and method for photonically assisted analog to digital signal conversion | US13990161 | 2011-11-29 | US08963751B2 | 2015-02-24 | Dan Mark Marom |
| A photonically assisted analog to digital conversion (ADC) system is presented. The system comprises: an optical sampling signal generator configured and operable for generating an optical sampling signal comprising a predetermined sampling pulse sequence in the form of a time separated pulse train of spectral components dispersed in a periodic fashion, where each pulse is distinguishable by a central wavelength thereof different from its neighboring pulses. The generation of the pulse sampling sequence is achieved by combining broadband dispersion and compensation with a periodic dispersion compensator having a free spectral range smaller than the broad bandwidth of the ultrashort pulse. The second innovative element is the introduction of coherent detection with oversampling of the interference terms of the phase modulated pulse sampling sequence and a reference pulse. The over-sampling provides additional measurements of the beat term and by way of error minimization a more reliable phase estimation is provided, translated into a more accurate conversion to digital representation. The system further comprises an electro-optical modulator for interacting an input electric analog signal and an optical sampling signal and generating a modulated optical signal indicative of said input signal; and a detection system configured and operable for receiving said modulated optical signal and generating an output digital signal corresponding to said input electric analog signal. | ||||||
| 159 | Ultra-high-speed photonic-enabled ADC based on multi-phase interferometry | US13386422 | 2010-07-25 | US08953950B2 | 2015-02-10 | Moshe Nazarathy; Igor Zelniker |
| A ultra high speed photonic Analog to Digital Converted (ADC) for sampling and quantizing an electrical voltage signal, internally enabled by photonics uses coherent optical detection architectures for photonic quantization. Coherent light is phase modulated by the test signal. Using an interferometer, or an array of interferometers the phase of modulated light is compared with a reference light. Flash ADC, successive approximation ADC and delta-sigma ADC configurations are presented. | ||||||
| 160 | Optical intensity-to-phase converter, mach-zehnder interferometer, optical A/D converter, and method of constructing optical intensity-to-phase converter | US13698019 | 2011-04-28 | US08922410B2 | 2014-12-30 | Shinya Sudo; Kenji Sato |
| An optical intensity-to-phase converter according to the present invention includes first and second waveguides to which a first input light is input, a third waveguide to which a second input light is input, and an interaction region that is provided in common on the second and third waveguides in which the first and second input lights are multiplexed and interact. The optical intensity-to-phase converter provides delay to output lights output from the first and second waveguides based on intensity of the first or second input light. Then, it is possible to provide an optical intensity-to-phase converter that enables simple configuration of an optical A/D converter. | ||||||
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