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公开(公告)号：US20240310867A1
公开(公告)日：2024-09-19
申请号：US18675736
申请日：2024-05-28
申请人： Lightmatter, Inc.
发明人： Michael Gould , Carl Ramey , Nicholas C. Harris , Darius Bunandar
CPC分类号： G06E3/008 , H03H17/06 , H03H2017/0081 , H03M1/12
摘要： 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：US20240248260A1
公开(公告)日：2024-07-25
申请号：US18417875
申请日：2024-01-19
申请人： Lightmatter, Inc.
发明人： Mihika Prabhu , Alexander Sludds , Aravind Kalaiah , Ajay Joshi , Bradford Turcott , Robert Turner , Nicholas C. Harris , Darius Bunandar
CPC分类号： G02B6/3546 , G02B6/29353 , G02B6/29355
摘要： Provided herein are optical flow switches, and optical flow switch packages, implemented using photonic switches. The optical flow switch includes a network of photonic switches arranged between input and output ports of the optical flow switch. The network of photonic switches spans two or more reticles, and the two or more reticles may include photonic switching arrangements corresponding to repeated reticle masks or sets of reticle masks. The optical flow switch may be mounted to a glass substrate to form an optical flow switch package.
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公开(公告)号：US20240159967A1
公开(公告)日：2024-05-16
申请号：US18504676
申请日：2023-11-08
申请人： Lightmatter, Inc.
发明人： Darius Bunandar
摘要： Photonic interconnect systems are described. A fiber connects a first photonic integrated circuit (PIC) to a second PIC. The fiber is non-polarization maintaining and as a results creates polarization drift. As a result, the polarization appearing at the output of a fiber may be different from the polarization launched at the input of the fiber. To reduce the negative effects of polarization drift, each PIC may be equipped with a polarization locker. Control circuitry is configured to control the first and second polarization lockers by setting one of the first and second polarization lockers to an active configuration and setting the other of the first and second polarization lockers to a passive configuration. Controlling the polarization lockers in this way prevents inconsistencies in polarization without having to expend additional resources that would otherwise be required to communicate the phase shift across the fiber.
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公开(公告)号：US20240103219A1
公开(公告)日：2024-03-28
申请号：US18526652
申请日：2023-12-01
申请人： Lightmatter, Inc.
发明人： Nicholas C. Harris , Carl Ramey , Michael Gould , Thomas Graham , Darius Bunandar , Ryan Braid , Mykhailo Tymchenko
IPC分类号： G02B6/122 , G02B6/12 , G02B6/13 , G02B6/136 , H01L21/027
CPC分类号： G02B6/1225 , G02B6/12004 , G02B6/12007 , G02B6/13 , G02B6/136 , H01L21/0275 , H04J14/02
摘要： Described herein are photonic communication platforms that can overcome the memory bottleneck problem, thereby enabling scaling of memory capacity and bandwidth well beyond what is possible with conventional computing systems. Some embodiments provide photonic communication platforms that involve use of photonic modules. Each photonic module includes programmable photonic circuits for placing the module in optical communication with other modules based on the needs of a particular application. The architecture developed by the inventors relies on the use of common photomask sets (or at least one common photomask) to fabricate multiple photonic modules in a single wafer. Photonic modules in multiple wafers can be linked together into a communication platform using optical or electronic means.
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公开(公告)号：US11768662B1
公开(公告)日：2023-09-26
申请号：US18111008
申请日：2023-02-17
申请人： Lightmatter, Inc.
发明人： Nicholas C. Harris , Darius Bunandar , Michael Gould , Carl Ramey , Shashank Gupta , Carlos Dorta-Quinones
摘要： 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：US11709520B2
公开(公告)日：2023-07-25
申请号：US17507325
申请日：2021-10-21
申请人： Lightmatter, Inc.
IPC分类号： G06E1/04
CPC分类号： G06E1/045
摘要： Systems and methods for performing matrix operations using a path-number balanced optical network are provided. The optical network is formed as an array including active optical components and passive optical components arranged at a substantially central location of the array. The optical network includes at least NM active optical components which are used to implement a first matrix of any size N×M by embedding the first matrix in a second matrix of a larger size. The optical network performs matrix-vector and matrix-matrix operations by propagating one or more pluralities of optical signals corresponding to an input vector through the optical network.
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公开(公告)号：US11700078B2
公开(公告)日：2023-07-11
申请号：US17383509
申请日：2021-07-23
申请人： Lightmatter, Inc.
发明人： Darius Bunandar , Michael Gould , Nicholas C. Harris , Carl Ramey
CPC分类号： H04J14/04 , H04B10/5051 , H04B10/801 , H04J14/02 , H04J14/0279
摘要： Systems and methods for increasing throughput of a photonic processor by using photonic degrees of freedom (DOF) are provided. The photonic processor includes a multiplexer configured to multiplex, using at least one photonic DOF, multiple encoded optical signals into a multiplexed optical signal. The photonic processor also includes a detector coupled to an output of an optical path including the multiplexer, the detector being configured to generate a first current based on the multiplexed optical signal or a demultiplexed portion of the multiplexed optical signal. The photonic processor further includes a modulator coupled to and output of the detector, the modulator being configured to generate a second current by modulating the first current.
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公开(公告)号：US11626931B2
公开(公告)日：2023-04-11
申请号：US17539377
申请日：2021-12-01
申请人： Lightmatter, Inc.
发明人： Darius Bunandar , Nicholas C. Harris , Carl Ramey
摘要： Aspects relate to a photonic processing system, a photonic processor, and a method of performing matrix-vector multiplication. An optical encoder may encode an input vector into a first plurality of optical signals. A photonic processor may receive the first plurality of optical signals; perform a plurality of operations on the first plurality of optical signals, the plurality of operations implementing a matrix multiplication of the input vector by a matrix; and output a second plurality of optical signals representing an output vector. An optical receiver may detect the second plurality of optical signals and output an electrical digital representation of the output vector.
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公开(公告)号：US11609742B2
公开(公告)日：2023-03-21
申请号：US17398384
申请日：2021-08-10
申请人： Lightmatter, Inc.
发明人： Nicholas C. Harris , Darius Bunandar , Michael Gould , Carl Ramey , Shashank Gupta , Carlos Dorta-Quinones
摘要： 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：US20220416908A1
公开(公告)日：2022-12-29
申请号：US17840515
申请日：2022-06-14
申请人： Lightmatter, Inc.
摘要： Systems and methods for performing signed 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. An apparatus may be used to implement a signed value of an output of the linear processor. The linear photonic processor may be configured to perform matrix-vector and/or matrix-matrix operations.
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