Ayman Fathy Abouraddy

US Patent:

6882431, Apr 19, 2005

Filed:

Nov 26, 2002

Appl. No.:

10/304985

Inventors:

Malvin C. Teich - Boston MA, US
Bahaa E A. Saleh - Lexington MA, US
Alexander V. Sergienko - Boston MA, US
Ayman F. Abouraddy - Boston MA, US
Magued B. Nasr - Allston MA, US

International Classification:

G01B009/02

US Classification:

356497

Abstract:

The disclosed Quantum Optical Coherence Tomography apparatus and method includes a source of quantum entangled photons and a quantum interference device. The pair of entangled photons is divided into two beams, one of which illuminates a semi-reflective object and the second of which is reflected from a variable optical time-delay element (VTE). The VTE is scanned and the quantum interference in the QID is recorded to build up a reflectance profile of the object. A real scanning produces a full tomographic reflectance image. A method of processing the data to eliminate the effects of optical dispersion is disclosed.

US Patent:

7292758, Nov 6, 2007

Filed:

Jul 1, 2005

Appl. No.:

11/173827

Inventors:

Mehmet Bayindir - Somerville MA, US
Fabien Sorin - Cambridge MA, US
Ayman F. Abouraddy - Boston MA, US
Dursen Saygin Hinczewski - Cambridge MA, US
Ofer Shapira - Cambridge MA, US
Jerimy Arnold - Cambridge MA, US
Jean F. Viens - Boston MA, US
Yoel Fink - Brookline MA, US
John D. Joannopoulos - Belmont MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G02B 6/26
G02B 6/44
G02B 6/02
G02B 6/036

US Classification:

385101, 385 39, 385127

Abstract:

The invention provides an optical fiber photodetector including a photoconductive element, such as a semiconducting element, having a fiber length. The semiconducting element is characterized as a non-composite material in at least one fiber direction. At least one pair of conducting electrodes is in contact with the semiconducting element along the fiber length, and an insulator is provided along the fiber length. An optical resonator can be disposed along the fiber length and along a path of illumination to the semiconducting element. The resonator is dimensioned to substantially reflect all illumination wavelengths except for a prescribed range of wavelengths transmitted to the semiconducting element. The fiber photodetector can be arranged in a photodetecting fiber grid, photodetecting fiber fabric, or other configuration for detecting incident illumination.

US Patent:

7567740, Jul 28, 2009

Filed:

Sep 28, 2006

Appl. No.:

11/529111

Inventors:

Mehmet Bayindir - Ankara, TR
Fabien Sorin - Cambridge MA, US
Ayman F. Abouraddy - Boston MA, US
Ofer Shapira - Cambridge MA, US
Jerimy R. Arnold - Cambridge MA, US
Yoel Fink - Brookline MA, US
John D. Joannopoulos - Belmont MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G02B 6/44
G02B 6/00

US Classification:

385101, 385 12, 385100

Abstract:

There is provided a thermal sensing fiber including a semiconducting element having a fiber length and characterized by a bandgap energy corresponding to a selected operational temperature range for the fiber in which there can be produced a change in thermally-excited electronic charge carrier population in the semiconducting element in response to a temperature change in the selected temperature range. At least one pair of conducting electrodes is provided in contact with the semiconducting element along the fiber length, and an insulator is provided along the fiber length.

US Patent:

7805029, Sep 28, 2010

Filed:

Mar 5, 2009

Appl. No.:

12/380929

Inventors:

Mehmet Bayindir - Ankara, TR
Fabien Sorin - Cambridge MA, US
Ayman F. Abouraddy - Boston MA, US
Ofer Shapira - Cambridge MA, US
Jeremy R. Arnold - Cambridge MA, US
Yoel Fink - Brookline MA, US
John D Joannopoulos - Belmont MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G02B 6/00
G02B 6/44

US Classification:

385 12, 385100, 385101

Abstract:

There is provided a feedback-controlled self-heat-monitoring fiber, including an insulator having a fiber length with at least one metal-semiconductor-metal thermal sensing element along the fiber length and disposed at a position in a cross section of the fiber for sensing changes in fiber temperature. An electronic circuit is connected to the thermal sensing element for indicating changes in fiber temperature. A controller is connected for controlling optical transmission through an optical transmission element, that is disposed along the fiber length, in response to indications of changes in fiber temperature.

US Patent:

8098966, Jan 17, 2012

Filed:

Jun 18, 2010

Appl. No.:

12/818233

Inventors:

Mehmet Bayindir - Ankara, TR
Fabien Soren - Cambridge MA, US
Ayman F. Abouraddy - Winter Park FL, US
Ofer Shapira - Cambridge MA, US
Jerimy R. Arnold - Cambridge MA, US
Yoel Fink - Brookline MA, US
John D Joannopoulos - Belmont MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G02B 6/00
G02B 6/12
G02B 6/44

US Classification:

385 12, 385 14, 385101

Abstract:

There is provided a thermal sensing fiber grid, including a plurality of rows and columns of thermal sensing fibers, each of which includes a semiconducting element that has a fiber length and that is characterized by a bandgap energy corresponding to a selected operational temperature range of the fiber in which there can be produced a change in thermally-excited electronic charge carrier population in the semiconducting element in response to a temperature change in the selected temperature range. There is included at least one pair of conducting electrodes in contact with the semiconducting element along the fiber length, and an insulator along the fiber length. An electronic circuit is provided for and connected to each thermal sensing fiber for producing an indication of thermal sensing fiber grid coordinates of a change in ambient temperature.

US Patent:

20040036877, Feb 26, 2004

Filed:

May 20, 2003

Appl. No.:

10/441889

Inventors:

Alexander Sergienko - Boston MA, US
Bahaa Saleh - Lexington MA, US
Malvin Teich - Boston MA, US
Kimani Toussaint - Brookline MA, US
Ayman Abouraddy - Boston MA, US

International Classification:

G01J004/00

US Classification:

356/369000

Abstract:

A system for obtaining ellipsometric data from a sample. The system includes a source for providing a monochromatic light beam. The system also includes a nonlinear crystal for converting the monochromatic light beam into photon pairs by disintegrating photons from the monochromatic light beam, such that each of the photon pairs exhibits entanglement properties, wherein one of the photons of the pair is directed to the sample and the other of the photons of the pair is not directed to the sample. The system further includes a circuit for calculating the coincidence of one of the photons of the photon pair reflected from the sample and the other of the photons of the photon pair, wherein the measurements of the sample are obtained by analyzing the coincidence and the entanglement properties between one of the photons of the photon pair reflected from the sample and the other of the photons of the photon pair.

US Patent:

20110284729, Nov 24, 2011

Filed:

May 11, 2011

Appl. No.:

13/105587

Inventors:

Ayman Abouraddy - Oviedo FL, US
Robert Bernath - Orlando FL, US
Esmaeil Banaei - Orlando FL, US

Assignee:

University of Central Florida Research Foundation, Inc. - Orlando FL

International Classification:

G01J 1/04
G02F 1/35

US Classification:

25022711, 359326

Abstract:

In one embodiment a system and method for harvesting optical energy employ an optical energy harvesting fiber including a core having active elements that absorb light at one wavelength of range of wavelengths and emit light at one or more different wavelengths, a guiding structure that guides the emitted light along a length of the fiber, and a cladding that surrounds the core.

US Patent:

20160187578, Jun 30, 2016

Filed:

Jan 7, 2016

Appl. No.:

14/989882

Inventors:

- Cambridge MA, US
Nicholas D. Orf - Cambridge MA, US
Ayman F. Abouraddy - Oviedo FL, US
Yoel Fink - Brookline MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G02B 6/036
G02B 6/02

Abstract:

In a fiber there is provided a fiber matrix material having a fiber length. A circumferential array of in-fiber filaments extend the fiber length. Each filament in the array is separated from other filaments in the array by the fiber matrix material. The filaments in the array are regularly spaced around a circumference at a radius in a cross section of the fiber.