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公开(公告)号：US20230351168A1
公开(公告)日：2023-11-02
申请号：US18310697
申请日：2023-05-02
摘要： An all-photonic computational accelerator encodes information in the amplitudes of frequency modes stored in a ring resonator. Nonlinear optical processes enable interaction among these modes. Both the matrix multiplication and element-wise activation functions on these modes (the artificial neurons) occur through coherent processes, enabling the representation of negative and complex numbers without digital electronics. This accelerator has a lower hardware footprint than electronic and optical accelerators, as the matrix multiplication happens in a single multimode resonator on chip. Our architecture provides a unitary, reversible mode of computation, enabling on-chip analog Hamiltonian-echo backpropagation for gradient descent and other self-learning tasks. Moreover, the computational speed increases with the power of the pumps to arbitrarily high rates, as long as the circuitry can sustain the higher optical power.
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公开(公告)号：US20200284989A1
公开(公告)日：2020-09-10
申请号：US16827795
申请日：2020-03-24
摘要： A method of nonblocking optical switching includes guiding a first optical beam from a first input to a first output via a first path through an optical switching fabric. The first path traverses a phase shifter disposed between a pair of cascaded Mach-Zehnder interferometers. The method also includes receiving a second optical beam for a second path intersecting with the first path through the optical switching fabric. The method also includes moving the first optical beam from the first path to a third path connecting the first input to the first output without intersecting the second path. The method also includes shifting a phase of the first optical beam, with the phase shifter, while moving the first optical beam from the first path to the third path to prevent the first optical beam from interfering with the second optical beam.
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公开(公告)号：US20240244354A1
公开(公告)日：2024-07-18
申请号：US18561985
申请日：2022-05-20
发明人： Manya Ghobadi , Zhizhen Zhong , Weiyang Wang , Liane Sarah Beland Bernstein , Alexander Sludds , Ryan HAMERLY , Dirk Robert ENGLUND
IPC分类号： H04Q11/00 , G06N5/04 , H04B10/524
CPC分类号： H04Q11/0005 , G06N5/04 , H04B10/524 , H04Q2011/0039 , H04Q2011/0041
摘要： In-network Optical Inference (IOI) provides low-latency machine learning inference by leveraging programmable switches and optical matrix multiplication. IOI uses a transceiver module, called a Neuro Transceiver, with an optical processor to perform linear operations, such as matrix multiplication, in the optical domain. IOI's transceiver modules can be plugged into programmable packet switches, which are programmed to perform non-linear activations in the electronic domain and to respond to inference queries. Processing inference queries at the programmable packet switches inside the network, without sending them to cloud or edge inference servers, significantly reduces end-to-end inference latency experienced by users.
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公开(公告)号：US20180314131A1
公开(公告)日：2018-11-01
申请号：US15792066
申请日：2017-10-24
发明人： Mihir Pant , Dirk Robert ENGLUND , Mikkel HEUCK
CPC分类号： G02F1/31 , G02F1/3501 , G02F1/3536 , G02F1/39 , G02F2001/3503 , H04B10/70
摘要： A photon source to deliver single photons includes a storage ring resonator to receive pump photons and generate a signal photon and an idler photon. An idler resonator is coupled to the storage resonator to couple the idler photon out of the storage resonator and into a detector. Detection of the idler photon stops the pump photons from entering the storage resonator. A signal resonator is coupled to the storage resonator to couple out the signal photon remaining in the storage resonator and delivers the signal photon to applications. The photon source can be fabricated into a photonic integrated circuit to achieve high compactness, reliability, and controllability.
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公开(公告)号：US20240118537A1
公开(公告)日：2024-04-11
申请号：US18480981
申请日：2023-10-04
申请人： The MITRE Corporation , Sandia National Laboratories , MIT - Massachusetts Institute of Technology
IPC分类号： G02B26/10
CPC分类号： G02B26/103
摘要： Provided herein is a photonic integrated circuit and methods for controlling a photonic integrated circuit that can utilize the resonant frequency of one or more components of the photonic integrated circuit to enhance the response of the circuit. At least one component of the photonic integrated circuit can be driven by an electrical signal whose frequency is substantially equal to the mechanical resonance frequency of the component such that the response of the optical component is increased. The component of the photonic integrated circuit can include a phase shifter that can impart a phase shift on a received optical signal. By driving the phase shifter with an electrical signal that is equal to the mechanical resonance frequency of the optical phase shifter, less power can be required to impart a desired phase shift on a received optical signal. The optical components can be implemented using piezoelectric cantilevers.
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公开(公告)号：US20240069368A1
公开(公告)日：2024-02-29
申请号：US17898147
申请日：2022-08-29
IPC分类号： G02F1/025 , B23K26/362
CPC分类号： G02F1/025 , B23K26/362 , B23K2101/40
摘要： Methods and systems are described for precisely adjusting characteristics of microfabricated devices after device fabrication. The adjustments can be carried out in parallel on a plurality of the microfabricated devices. By carrying out the adjustment process, uniformity of feature sizes to a few picometers (one standard deviation) and corresponding uniformity of operating characteristics for a plurality of microfabricated devices are possible.
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公开(公告)号：US20230274156A1
公开(公告)日：2023-08-31
申请号：US18247129
申请日：2021-07-29
发明人： Ryan HAMERLY , Dirk Robert ENGLUND
摘要： NetCast is an optical neural network architecture that circumvents constraints on deep neural network (DNN) inference at the edge. Many DNNs have weight matrices that are too large to run on edge processors, leading to limitations on DNN inference at the edge or bandwidth bottlenecks between the edge and server that hosts the DNN. With NetCast, a weight server stores the DNN weight matrix in local memory, modulates the weights onto different spectral channels of an optical carrier, and distributes the weights to one or more clients via optical links. Each client stores the activations, or layer inputs, for the DNN and computes the matrix-vector product of those activations with the weights from the weight server in the optical domain. This multiplication can be performed coherently by interfering the spectrally multiplexed weights with spectrally multiplexed activations or incoherently by modulating the weight signal from the weight server with the activations.
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公开(公告)号：US20220082639A1
公开(公告)日：2022-03-17
申请号：US17376234
申请日：2021-07-15
IPC分类号： G01R33/032 , G01R29/08
摘要： Nitrogen vacancy (NV) centers in diamond combine exceptional sensitivity with nanoscale spatial resolution by optically detected magnetic resonance (ODMR). Infrared (IR)-absorption-based readout of the NV singlet state transition can increase ODMR contrast and collection efficiency. Here, a resonant diamond metallodielectric metasurface amplifies IR absorption by concentrating the optical field near the diamond surface. This plasmonic quantum sensing metasurface (PQSM) supports plasmonic surface lattice resonances and balances field localization and sensing volume to optimize spin readout sensitivity. Combined electromagnetic and rate-equation modeling suggests a near-spin-projection-noise-limited sensitivity below 1 nT Hz−1/2 per m2 of sensing area using numbers for contemporary NV diamond samples and fabrication techniques. The PQSM enables microscopic ODMR sensing with IR readout near the spin-projection-noise-limited sensitivity, making it appealing for imaging through scattering tissues and spatially resolved chemical NMR detection.
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公开(公告)号：US20230288637A1
公开(公告)日：2023-09-14
申请号：US18152638
申请日：2023-01-10
发明人： Artur Hermans , Adrian Johannes Menssen , Christopher Louis Panuski , Ian Robert Christen , Dirk Robert ENGLUND
CPC分类号： G02B6/1225 , G02B6/124 , G02B6/12002 , G06N10/40 , G02B2006/12061 , G02B2006/12142
摘要： An atom control architecture based on VIS-IR photonic integrated circuit (PIC) technology is characterized by (1) visible (VIS) and near-infrared (IR) wavelength operation, (2) channel counts extensible beyond 1000s of individually addressable atoms, (3) high intensity modulation extinction and (4) repeatability compatible with low gate errors, and (5) fast switching times. A 16-channel SiN-based APIC with (5.8±0.4) ns response times and
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10.发明公开公开(公告)号：US20230208628A1
公开(公告)日：2023-06-29
申请号：US18146085
申请日：2022-12-23
发明人： Stefan Ivanov Krastanov , Hamza Raniwala , Hanfeng WANG , Matthew Edwin TRUSHEIM , Laura KIM , Dirk Robert ENGLUND
CPC分类号： H04L9/0855 , H04B10/70
摘要： A 1D diamond nanobeam can act as a coherent mechanical interface between spin defect centers in diamond and telecom optical modes. The nanobeam includes embedded mechanical and electric field concentrators with mechanical and optical mode volumes of Vmech/Λp3 ˜10−5 and Vopt/λ3 ˜10−3, respectively. With a Group IV vacancy in the concentrator, the nanobeam can operate at spin-mechanical coupling rates approaching 40 MHz with high acousto-optical couplings. This nanobeam, used in an entanglement heralding scheme, can provide high-fidelity Bell pairs between quantum repeaters. Using the mechanical interface as an intermediary between the optical and spin subsystems enables addressing the spin defect center with telecom optics, bypassing the native wavelength of the spin. As the spin is never optically excited or addressed, the device can operate at temperatures up to 40 K with no appreciable spectral diffusion, limited by thermal losses. Optomechanical devices with high spin-mechanical coupling can be useful for quantum repeaters.
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