Daniel J Gauthier

US Patent:

7990540, Aug 2, 2011

Filed:

Sep 12, 2008

Appl. No.:

12/209353

Inventors:

Robert W. Boyd - Webster NY, US
Daniel J. Gauthier - Durham NC, US
Zhimin Shi - Rochester NY, US

Assignee:

University of Rochester - Rochester NY
Duke University - Durham NC

International Classification:

G01B 9/02

US Classification:

356451, 356454

Abstract:

According to the invention, a highly optically dispersive medium is one in which the absolute value of the group index of refraction of the medium is equal to or greater than four. An optical spectroscopic parameter detection and/or measurement apparatus may be in the form of an interferometer, a spectral interferometer, a spectrometer, a wavemeter, a tunable narrowband filter The embodied devices include a highly dispersive medium that appropriately can facilitate either a slow-light effect or a fast-light effect, which is disposed in a propagation path of an electro-magnetic (EM) input field and, a detector disposed in a manner to detect an output field resulting from the input filed interaction with the highly dispersive medium. Methods involve measuring a spectroscopic parameter using an optical spectroscopic parameter detection and/or measurement apparatus that incorporates a highly dispersive medium.

US Patent:

55284159, Jun 18, 1996

Filed:

Nov 9, 1994

Appl. No.:

8/336411

Inventors:

Daniel J. Gauthier - Durham NC
Hugh G. Robinson - Superior CO

Assignee:

Duke University - Durham NC

International Classification:

G02B 530
G02B 2728
G02F 109

US Classification:

359282

Abstract:

An optical isolator is disclosed that is particularly useful in the visible, infrared, and near-infrared portions of the electromagnetic spectrum. The rotator portion of the isolator produces a highly uniform magnetic intensity across its clear aperture. The optical isolator comprises a Faraday rotator that defines an optical axis, a respective polarizer on each end of the Faraday rotator and positioned on the optical axis, and a housing containing the Faraday rotator and the polarizers. The Faraday rotator comprises an optical rotator rod that defines the optical axis and a magnet assembly surrounding the optical rotator rod. The magnet assembly comprises eight trapezoidal cross section magnet sections arranged in a first group of four and a second group of four. The magnet sections in each group are placed adjacent one another along their respective nonparallel sides to form an overall square cross section for each group with a square cross section aperture through each group that surrounds the optical rotator rod. The first and second groups are arranged linearly adjacent to one another along the optical axis of the optical rod.

US Patent:

20220383166, Dec 1, 2022

Filed:

Sep 30, 2020

Appl. No.:

17/765895

Inventors:

- Columbus OH, US
Daniel GAUTHIER - Hilliard OH, US

International Classification:

G06N 7/00

Abstract:

A method of optimizing a topology for reservoir computing comprises optimizing a plurality of reservoir computer (RC) hyperparameters to generate a topology, and creating a reservoir as a network of interacting nodes with the topology. Optimizing the RC hyperparameters uses a Bayesian technique. The RC hyperparameters comprise: γ, which sets a characteristic time scale of the reservoir, σ, which determines a probability a node is connected to a reservoir input, ρ, which sets a scale of input weights, k, a recurrent in-degree of the network, and ρ, a spectral radius of the network.

US Patent:

20210264242, Aug 26, 2021

Filed:

Mar 27, 2019

Appl. No.:

17/255033

Inventors:

- Columbus OH, US
Daniel GAUTHIER - Hilliard OH, US
Aaron GRIFFITH - Reynoldsburg OH, US

International Classification:

G06N 3/063
G06N 3/04
G06N 3/08

Abstract:

Reservoir computing systems and methods provide rapid processing speed by the reservoir and by the output layer. A hardware implementation of reservoir computing is based on an autonomous, time-delay, Boolean network realized on a readily-available platform known as a field-programmable gate array (FPGA). This approach allows for a seamless coupling of the reservoir to the output layer due to the spatially simple nature of the reservoir state and because matrix multiplication of a Boolean vector can be realized with compact Boolean logic. Embodiments may be used to predict the behavior of a chaotic dynamical system.