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公开(公告)号：WO2022246171A2
公开(公告)日：2022-11-24
申请号：PCT/US2022/030215
申请日：2022-05-20
Applicant: LIGHTMATTER, INC.
Inventor： RAMEY, Carl , HARRIS, Nicholas, C. , ESLAMPOUR, Hamid , DOBBIE, Bradley David , GOULD, Michael , KOPA, Anthony , GRESKAMP, Brian , BUNANDAR, Darius
Abstract: Electronic-photonic packages and related fabrication methods are described. A package may include a plurality of photonic integrated circuits (PICs), where each PIC comprises a photonic accelerator configured to perform matrix multiplication in the optical domain. The package may further include an application specific integrated circuit (ASIC) configured to control at least one of the photonic accelerators. The package further includes an interposer. The plurality of PICs are coupled to a first side of the interposer and the ASIC is coupled to a second side of the interposer opposite the first side. A first thermally conductive member in thermal contact with at least one of the PICs. The first thermally conductive member may include a heat spreader. A second thermally conductive member in thermal contact with the ASIC. The second thermally conductive member may include a lid. The first thermally conductive member faces the first side of the interposer, and the second thermally conductive member faces the second side of the interposer. In some embodiments, the interposer sits in part on a substrate and in part on the PICs.
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公开(公告)号：WO2020149871A1
公开(公告)日：2020-07-23
申请号：PCT/US2019/032111
申请日：2019-05-14
Applicant: LIGHTMATTER, INC.
Inventor： HARRIS, Nicholas, C. , GOULD, Michael , YILDIRIM, Omer, Ozgur
Abstract: Low-noise optical differential receivers are described. Such differential receivers may include a differential amplifier having first and second inputs and first and second outputs, and four photodetectors. A first and a second of such photodetectors are coupled to the first input of the differential amplifier, and a third and a fourth of such photodetectors are coupled to the second input of the differential amplifier. The anode of the first photodetector and the cathode of the second photodetector are coupled to the first input of the differential amplifier. The cathode of the third photodetector and the anode of the fourth photodetector are coupled to the second input of the differential amplifier. The optical receiver may involve two stages of signal subtraction, which may significantly increase noise immunity.
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公开(公告)号：WO2021102076A1
公开(公告)日：2021-05-27
申请号：PCT/US2020/061169
申请日：2020-11-19
Applicant: LIGHTMATTER, INC.
Inventor： HARRIS, Nicholas, C. , GOULD, Michael , TYMCHENKO, Mykhailo , GAO, Weilu , GUPTA, Shashank
Abstract: The techniques described herein relate to methods and apparatus for interferometric modulation. An apparatus includes an interferometric device comprising a first optical path and a second optical path, and at least one Franz-Keldysh (FK) modulator disposed in either the first optical path or the second optical path of the interferometric device. The interferometric device receives input light, wherein a first portion of the input light travels along the first optical path of the interferometric device, and a second portion of the input light travels along the second optical path of the interferometric device. The FK modulator modulates an intensity of either the first portion of the input light or the second portion of the input light.
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公开(公告)号：WO2021102349A1
公开(公告)日：2021-05-27
申请号：PCT/US2020/061642
申请日：2020-11-20
Applicant: LIGHTMATTER INC.
Inventor： BUNANDAR, Darius , HARRIS, Nicholas, C. , GOULD, Michael , RAMEY, Carl , GUPTA, Shashank , DORTA-QUINONES, Carlos
IPC: H04J14/02
Abstract: Photonic processors are described. The photonic processors described herein are configured to perform matrix-matrix (e.g., matrix-vector) multiplication. Some embodiments relate to photonic processors arranged according to a dual-rail architecture, in which numeric values are encoded in the difference between a pair optical signals (e.g., in the difference between the powers of the optical signals). Relative to other architectures, these photonic processors exhibit increased immunity to noise. Some embodiments relate to photonic processors including modulatable detector-based multipliers. Modulatable detectors are detectors designed so that the photocurrent can be modulated according to an electrical control signal. Photonic processors designed using modulatable detector-based multipliers are significantly more compact than other types of photonic processors.
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公开(公告)号：WO2020081533A1
公开(公告)日：2020-04-23
申请号：PCT/US2019/056276
申请日：2019-10-15
Applicant: LIGHTMATTER, INC.
Inventor： KANNAN, Sukeshwar , RAMEY, Carl , GOULD, Michael , HARRIS, Nicholas, C.
Abstract: Photonic packages are described. One such photonic package includes a photonic chip, an application specific integrated circuit, and optionally, an interposer. The photonic chip includes photonic microelectromechanical system (MEMS) devices. A photonic package may include a material layer patterned to include recesses. The recesses are aligned with the photonic MEMS devices so as to form enclosed cavities around the photonic MEMS devices. This arrangement preserves the integrity of the photonic MEMS devices.
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Patent Agency Ranking
公开(公告)号：WO2022005910A1
公开(公告)日：2022-01-06
申请号：PCT/US2021/039227
申请日：2021-06-25
Applicant: LIGHTMATTER, INC.
Inventor： GOULD, Michael , RAMEY, Carl , HARRIS, Nicholas, C. , BUNANDAR, Darius
IPC: G06F17/16 , G06E3/008 , H03H17/06 , H03H2017/0081 , H03M1/12
Abstract: Hybrid analog-digital processing systems are described. An example of a hybrid analog-digital processing system includes photonic accelerator configured to perform matrix-vector multiplication using light. The photonic accelerator exhibits a frequency response having a first bandwidth (e.g., less than 3 GHz). The hybrid analog-digital processing system further includes a plurality of analog-to-digital converters (ADCs) coupled to the photonic accelerator, and a plurality of digital equalizers coupled to the plurality of ADCs, wherein the digital equalizers are configured to set a frequency response of the hybrid analog-digital processing system to a second bandwidth greater than the first bandwidth.
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公开(公告)号：WO2021222098A1
公开(公告)日：2021-11-04
申请号：PCT/US2021/029150
申请日：2021-04-26
Applicant: LIGHTMATTER, INC.
Inventor： HARRIS, Nicholas C. , KOPA, Anthony , GOULD, Michael , BUNANDAR, Darius , RAMEY, Carl
IPC: G06F17/16
Abstract: Photonic processors are described. The photonic processors described herein are configured to perform matrix multiplications (e.g., matrix vector multiplications). Matrix multiplications are broken down in scalar multiplications and scalar additions. Some embodiments relate to devices for performing scalar additions in the optical domain. One optical adder, for example, includes an interferometer having a plurality of phase shifters and a coherent detector. Leveraging the high-speed characteristics of these optical adders, some processors are sufficiently fast to support clocks in the tens of gigahertz of frequency, which represent a significant improvement over conventional electronic processors.
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公开(公告)号：WO2021102349A8
公开(公告)日：2021-05-27
申请号：PCT/US2020/061642
申请日：2020-11-20
Applicant: LIGHTMATTER, INC.
Inventor： BUNANDAR, Darius , HARRIS, Nicholas, C. , GOULD, Michael , RAMEY, Carl , GUPTA, Shashank , DORTA-QUINONES, Carlos
Abstract: Photonic processors are described. The photonic processors described herein are configured to perform matrix-matrix (e.g., matrix-vector) multiplication. Some embodiments relate to photonic processors arranged according to a dual-rail architecture, in which numeric values are encoded in the difference between a pair optical signals (e.g., in the difference between the powers of the optical signals). Relative to other architectures, these photonic processors exhibit increased immunity to noise. Some embodiments relate to photonic processors including modulatable detector-based multipliers. Modulatable detectors are detectors designed so that the photocurrent can be modulated according to an electrical control signal. Photonic processors designed using modulatable detector-based multipliers are significantly more compact than other types of photonic processors.
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公开(公告)号：WO2021021787A1
公开(公告)日：2021-02-04
申请号：PCT/US2020/043841
申请日：2020-07-28
Applicant: LIGHTMATTER, INC.
Inventor： BUNANDAR, Darius , HARRIS, Nicholas, C. , GOULD, Michael , RAMEY, Carl , LAZOVICH, Tomo
Abstract: SyCOmmstems and methods for performing matrix operations using a linear photonic processor are provided. The linear photonic processor is formed as an array of first amplitude modulators and second amplitude modulators, the first amplitude modulators configured to encode elements of a vector into first optical signals and the second amplitude modulators configured to encode a product between the vector elements and matrix elements into second optical signals. The linear photonic processor may be configured to perform matrix-vector and/or matrix-matrix operations.
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公开(公告)号：WO2019236250A1
公开(公告)日：2019-12-12
申请号：PCT/US2019/032272
申请日：2019-05-14
Applicant: LIGHTMATTER, INC.
Inventor： GOULD, Michael , BUNANDAR, Darius , GUPTA, Shashank , HARRIS, Nicholas C.
IPC: G01B9/02 , G01N33/483 , G02F1/035
Abstract: Optical encoders for encoding signed, real numbers using optical fields are described. The optical fields may be detected using coherent detection, without the need for independent phase and amplitude control. This encoding technique enables the use of simple and non-ideal modulators (e.g., modulators that provide neither pure phase nor pure amplitude modulation) for high-precision encoding. A photonic system implementing optical encoding techniques may include a modulator configured to be driven by a single electrical modulating signal and a coherent receiver. An optical transformation unit optically coupled between the modulator and the coherent receiver may transform the phase and/or the intensity of the modulated optical field. The optical encoding techniques described herein may he used in a variety of contexts, including high-speed telecommunications, on chip-phase sensitive measurements for sensing, communications and computing, and optical machine learning.
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