公开(公告)号：US20220012619A1

公开(公告)日：2022-01-13

申请号：US17239830

申请日：2021-04-26

Applicant: Massachusetts Institute of Technology

Inventor： Charles ROQUES-CARMES ,  Yichen Shen ,  Li JING ,  Tena DUBCEK ,  Scott A. SKIRLO ,  Hengameh BAGHERIANLEMRASKI ,  Marin SOLJACIC

IPC: G06N10/00 ,  G06N3/04 ,  G06N7/00 ,  G06N3/08 ,  G06N3/067

Abstract: A photonic parallel network can be used to sample combinatorially hard distributions of Ising problems. The photonic parallel network, also called a photonic processor, finds the ground state of a general Ising problem and can probe critical behaviors of universality classes and their critical exponents. In addition to the attractive features of photonic networks—passivity, parallelization, high-speed and low-power—the photonic processor exploits dynamic noise that occurs during the detection process to find ground states more efficiently.

公开(公告)号：US20190265574A1

公开(公告)日：2019-08-29

申请号：US16284161

申请日：2019-02-25

Applicant: Massachusetts Institute of Technology

Inventor： Scott A. SKIRLO ,  Cheryl Marie SORACE-AGASKAR ,  Marin SOLJACIC ,  Simon VERGHESE ,  Jeffrey S. HERD ,  Paul William JUODAWLKIS ,  Yi YANG ,  Dirk Robert ENGLUND ,  Mihika PRABHU

IPC: G02F1/313 ,  G02F1/295

Abstract: An integrated optical beam steering device includes a planar dielectric lens that collimates beams from different inputs in different directions within the lens plane. It also includes an output coupler, such as a grating or photonic crystal, that guides the collimated beams in different directions out of the lens plane. A switch matrix controls which input port is illuminated and hence the in-plane propagation direction of the collimated beam. And a tunable light source changes the wavelength to control the angle at which the collimated beam leaves the plane of the substrate. The device is very efficient, in part because the input port (and thus in-plane propagation direction) can be changed by actuating only log2 N of the N switches in the switch matrix. It can also be much simpler, smaller, and cheaper because it needs fewer control lines than a conventional optical phased array with the same resolution.

公开(公告)号：US20230045938A1

公开(公告)日：2023-02-16

申请号：US17736667

申请日：2022-05-04

Applicant: Massachusetts Institute of Technology

Inventor： Jacques Johannes CAROLAN ,  Mihika PRABHU ,  Scott A. SKIRLO ,  Yichen Shen ,  Marin SOLJACIC ,  DIRK ENGLUND ,  Nicholas C. HARRIS

IPC: G06E3/00 ,  G06N3/04 ,  G06N3/08 ,  G02F1/225 ,  G02F1/35 ,  G02F1/365 ,  G02F3/02 ,  G06N3/067

Abstract: An optical neural network is constructed based on photonic integrated circuits to perform neuromorphic computing. In the optical neural network, matrix multiplication is implemented using one or more optical interference units, which can apply an arbitrary weighting matrix multiplication to an array of input optical signals. Nonlinear activation is realized by an optical nonlinearity unit, which can be based on nonlinear optical effects, such as saturable absorption. These calculations are implemented optically, thereby resulting in high calculation speeds and low power consumption in the optical neural network.

公开(公告)号：US20200379504A1

公开(公告)日：2020-12-03

申请号：US16986383

申请日：2020-08-06

Applicant: Massachusetts Institute of Technology

Inventor： Jacques Johannes CAROLAN ,  Mihika PRABHU ,  Scott A. SKIRLO ,  Yichen Shen ,  Marin SOLJACIC ,  DIRK ENGLUND ,  Nicholas Christopher HARRIS

IPC: G06E3/00 ,  G06N3/04 ,  G06N3/08 ,  G02F1/225 ,  G02F1/35 ,  G02F1/365 ,  G02F3/02 ,  G06N3/067

Abstract: An optical neural network is constructed based on photonic integrated circuits to perform neuromorphic computing. In the optical neural network, matrix multiplication is implemented using one or more optical interference units, which can apply an arbitrary weighting matrix multiplication to an array of input optical signals. Nonlinear activation is realized by an optical nonlinearity unit, which can be based on nonlinear optical effects, such as saturable absorption. These calculations are implemented optically, thereby resulting in high calculation speeds and low power consumption in the optical neural network.

公开(公告)号：US20200333683A1

公开(公告)日：2020-10-22

申请号：US16842048

申请日：2020-04-07

Applicant: Massachusetts Institute of Technology

Inventor： Scott A. SKIRLO ,  Cheryl Marie SORACE-AGASKAR ,  Marin SOLJACIC ,  Simon VERGHESE ,  Jeffrey S. HERD ,  Paul William JUODAWLKIS ,  Yi YANG ,  DIRK ENGLUND ,  Mihika PRABHU

IPC: G02F1/313 ,  G02F1/295 ,  G01S7/481

Abstract: An integrated optical beam steering device includes a planar dielectric lens that collimates beams from different inputs in different directions within the lens plane. It also includes an output coupler, such as a grating or photonic crystal, that guides the collimated beams in different directions out of the lens plane. A switch matrix controls which input port is illuminated and hence the in-plane propagation direction of the collimated beam. And a tunable light source changes the wavelength to control the angle at which the collimated beam leaves the plane of the substrate. The device is very efficient, in part because the input port (and thus in-plane propagation direction) can be changed by actuating only log2 N of the N switches in the switch matrix. It can also be much simpler, smaller, and cheaper because it needs fewer control lines than a conventional optical phased array with the same resolution.