Jian Xu

US Patent:

7437464, Oct 14, 2008

Filed:

Jan 31, 2003

Appl. No.:

10/355264

Inventors:

Jian Xu - Herndon VA, US
Chung-Wen Yuan - North Potomac MD, US

Assignee:

Federal Home Loan Mortgage Corporation - McLean VA

International Classification:

G06F 15/16

US Classification:

709227, 709228, 709229

Abstract:

Systems and methods are provided for providing asynchronous communication between a source processor and a destination processor. In one embodiment, a method includes receiving an information request; making a first call to the destination processor, such that the first call includes the information request; and ending the first call while the destination processor determines an information response, such that said ending terminates a synchronous communication between the source processor and the destination processor. Furthermore, the method includes making a second call to the source processor, such that the second call includes the information response; ending the second call, such that said ending terminates a synchronous communication between the destination processor and the source processor; and providing asynchronously the information response.

US Patent:

20210080742, Mar 18, 2021

Filed:

Sep 16, 2020

Appl. No.:

17/023070

Inventors:

- Pasadena CA, US
Changhuei Yang - South Pasadena CA, US
Jian Xu - Pasadena CA, US

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

G02B 27/48
G02B 26/08
G02B 26/10
H04B 10/50
H04B 10/61

Abstract:

Optical wavefront shaping has been the standard technique to control light through scattering media. Implicit in this dominance is the assumption that knowledge of the optical phase is a necessity for optical control through scattering media. In this paper, we challenge this assumption by reporting on an intensity-only approach for light control through (or reflected from) a disordered scattering medium—optical-channel-based intensity streaming (OCIS). Instead of actively tuning the interference between the optical paths via wavefront shaping, OCIS can control light and transmit information through or from scattering media with linear intensity operation, which not only simplifies and speeds up the system but also enables new applications. We experimentally created focus patterns through scattering media in a sub-millisecond timescale with a phase-manipulation-free setup. We also demonstrate that, unlike wavefront shaping, OCIS can readily generate distinct energy null points through scattering media. Finally, we demonstrate that OCIS enables a scattering medium mediated secure optical communication application.

US Patent:

20200386535, Dec 10, 2020

Filed:

Jun 4, 2020

Appl. No.:

16/946063

Inventors:

- Pasadena CA, US
Jian Xu - Pasadena CA, US
Changhuei Yang - South Pasadena CA, US

International Classification:

G01B 9/02
G01B 11/24

Abstract:

Interferometric speckle visibility spectroscopy methods, systems, and non-transitory computer readable media for recovering sample speckle field data or a speckle field pattern from an off-axis interferogram recorded by one or more sensors over an exposure time and determining sample dynamics of a sample being analyzed from speckle statistics of the speckle field data or the speckle field pattern.