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公开(公告)号：US20240160084A1
公开(公告)日：2024-05-16
申请号：US18521839
申请日：2023-11-28
发明人： Ryan D. Muir , Vincent J. Hernandez , Brandon W. Buckley , Daniel E. Mittelberger , John E. Heebner
IPC分类号： G02F7/00 , G02F1/225 , H04B10/556
CPC分类号： G02F7/00 , G02F1/2255 , G02F1/2257 , H04B10/556 , G02F1/212
摘要： The nonlinearities of cascaded and series configurations of Mach-Zehnder electrooptic modulators are utilized to increase signal bandwidth and boost signal fidelity in electronic digital to analog converters.
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公开(公告)号：US11899292B2
公开(公告)日：2024-02-13
申请号：US17738775
申请日：2022-05-06
申请人： IonQ, Inc.
CPC分类号： G02F1/017 , G02F7/00 , G06F1/10 , G06N10/00 , G02F1/01791
摘要： The disclosure describes various aspects of a system with scalable and programmable coherent waveform generators. A network and digital-to-analog conversion (DAC) cards used by the network are described where each DAC card has a clock divider/replicator device with an input SYNC pin, a digital logic component, and one or more DAC components, and each output of the DAC components is used to control optical beams for a separate qubit of a quantum information processing (QIP) system. The network also includes a first distribution network to provide a clock signal to the clock divider/replicator device in the DAC cards, and a second distribution network to provide a start signal to the DAC cards, where the start signal is used by the digital logic component in the DAC card to assert the input SYNC pin when the start signal is asserted unless it is masked by the digital logic component.
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公开(公告)号：US11880116B2
公开(公告)日：2024-01-23
申请号：US17266943
申请日：2019-06-21
发明人： Shota Kita , Akihiko Shinya , Masaya Notomi , Kengo Nozaki
摘要： An optical DAC includes a 1:N splitter that splits a single light beam into N light beams corresponding to bits of an N-bit electrical digital signal (where N is an integer of 2 or more) and makes the N light beams different in optical intensities such that (N−1) light beams corresponding to bits except a least significant bit of the N-bit electrical digital signal each have an optical intensity which is four times as large as an optical intensity of a light beam corresponding to a next less significant bit, an optical intensity modulator that individually intensity-modulates the N light beams, an N:1 combiner that combines the N output light beams intensity-modulated by the optical intensity modulator and outputs the combined light, and a phase shifter that is adjustable such that the light beams that are combined by the N:1 combiner are made in phase.
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公开(公告)号：US20230314901A1
公开(公告)日：2023-10-05
申请号：US17709260
申请日：2022-03-30
IPC分类号： G02F7/00 , H04B10/564
CPC分类号： G02F7/00 , H04B10/564 , H04B10/69
摘要： A method and a system for adding a floating analog voltage signal over a reference analog voltage signal. The system and the method may accurately control the value of the floating analog voltage signal—using an optical feedback path, and may directly add the floating analog voltage signal over the reference analog voltage signal.
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公开(公告)号：US11342998B2
公开(公告)日：2022-05-24
申请号：US17481904
申请日：2021-09-22
发明人： Yossef Ehrlichman , Ofer Amrani , Shlomo Ruschin
IPC分类号： H03M3/00 , H04B10/516 , G02F1/01 , G02F7/00 , G02F1/225 , H04B10/50 , H04B10/25 , H04B10/2575 , H04B10/556 , H03M1/70 , H04B10/54 , H03M1/00 , G02F1/015 , G02F1/21
摘要： In a system for converting digital data into a modulated optical signal, an electrically controllable device having M actuating electrodes provides and optical signal that is modulated in response to binary voltages applied to the actuating electrodes. A digital-to-digital converter provides a mapping of input data words to binary actuation vectors for M bits and supplies the binary actuation vectors as M bits of binary actuation voltages to the M actuating electrodes, where M is larger than the number of bits in each input data word. The digital-to-digital converter maps each digital input data word to a binary actuation vector by selecting a binary actuation vector from a subset of binary actuation vectors available to represent each of the input data words.
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公开(公告)号：US20220006466A1
公开(公告)日：2022-01-06
申请号：US17448113
申请日：2021-09-20
发明人： Xu SUN , Jiao WANG , Yuchen LIU , Rui LI , Nguyen Binh LE
摘要： This application discloses a temperature feedback control apparatus, method. The method includes two electric switches, a feedback control unit and an optical component. A first electric switch is configured to control that only a first channel of at least two channels that correspond to the first electric switch is conducted at a moment, to feed back an optical signal of a target optical component connected to the first channel to the feedback control unit. The feedback control unit is configured to calculate temperature of the corresponding optical component based on an electrical signal converted from the optical signal, to obtain a control signal. The second electric switch is configured to control, when the first channel is conducted, that only the second channel is conducted, to transmit the control signal to the target optical component to adjust its temperature. The optical component connects to both the first and second channels.
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公开(公告)号：US20210278746A1
公开(公告)日：2021-09-09
申请号：US17266943
申请日：2019-06-21
发明人： Shota Kita , Akihiko Shinya , Masaya Notomi , Kengo Nozaki
摘要： An optical DAC includes a 1:N splitter that splits a single light beam into N light beams corresponding to bits of an N-bit electrical digital signal (where N is an integer of 2 or more) and makes the N light beams different in optical intensities such that (N−1) light beams corresponding to bits except a least significant bit of the N-bit electrical digital signal each have an optical intensity which is four times as large as an optical intensity of a light beam corresponding to a next less significant bit, an optical intensity modulator that individually intensity-modulates the N light beams, an N:1 combiner that combines the N output light beams intensity-modulated by the optical intensity modulator and outputs the combined light, and a phase shifter that is adjustable such that the light beams that are combined by the N:1 combiner are made in phase.
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公开(公告)号：US11036113B2
公开(公告)日：2021-06-15
申请号：US16702461
申请日：2019-12-03
发明人： Gary E. Betts , Charles H. Cox
摘要： A photonically-sampled electronically-quantized analog-to-digital converter generates an optical signal comprising a series of optical pulses. The optical signal is split into a first and a second optical path. The split optical signal is detected in the first path and then the detected optical signal is converted to a reference digital signal. The split optical signal in the second path is modulated with an input RF signal and a plurality of demultiplexed RF-modulated optically-sampled signals is generated from the modulated optical signal. The plurality of demultiplexed RF-modulated optically-sampled signals is then pulse broadened, detected, and converted to a plurality of sampled-RF digital signals. The reference digital signal and the plurality of sampled-RF digital signals are digital signal processed to generate a digital representation of the input RF signal.
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公开(公告)号：US10651867B2
公开(公告)日：2020-05-12
申请号：US16132103
申请日：2018-09-14
发明人： Weiwen Zou , Shaofu Xu , Jianping Chen
摘要： A high-speed and high-precision photonic analog-to-digital conversion device capable of realizing intelligent signal processing. Learning ability of deep learning technology is utilized to learn the nonlinear response and channel mismatch effect of the system and configure optimal parameters of the deep network. Deterioration of photonic analog-to-digital conversion system performance caused by nonlinear distortion and channel mismatch distortion is eliminated in real time, and performance indicators thereof are improved. By using the induction and deduction ability of deep learning technology, intelligent signal processing of the input signal is realized, and users are provided with digital signals that meet the requirements. It's important for improving the performance of microwave photonic systems that require high sampling rate, high time precision, and high sampling accuracy, such as microwave photonic radar and optical communication systems, and also critical to improve the signal processing ability of such systems under complex conditions.
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公开(公告)号：US10461866B2
公开(公告)日：2019-10-29
申请号：US16386391
申请日：2019-04-17
发明人： Yossef Ehrlichman , Ofer Amrani , Shlomo Ruschin
IPC分类号： H03M1/00 , H04B10/516 , G02F7/00 , G02F1/225 , H04B10/54 , H04B10/50 , H04B10/25 , H03M1/70 , H04B10/2575 , G02F1/01 , H04B10/556 , G02F1/015 , G02F1/21
摘要： In a modulation system that modulates and transmits an optical signal over at least one optical fiber in response to an input digital data word of N bits, there is an input enabled for receiving the digital data word; an electrically controllable modulator having one or more waveguide branches, where each branch receives an input of an unmodulated optical signal; and a digital to digital converter enabled for converting the N bits to a digital drive vector corresponding to M drive voltage values, where M>N and N>1. The electrically controllable modulator couples the drive voltage values to the unmodulated optical signal(s). The coupling enables pulse modulation of the unmodulated optical signal(s) thereby generating pulse modulated optical signal(s). The electrically controllable modulator outputs the pulse modulated optical signal(s) to one or more outputs that are enabled for transmitting the pulse modulated optical signal(s) over at least one optical fiber.
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