Geoffrey L Burdge

US Patent:

7755755, Jul 13, 2010

Filed:

Feb 14, 2007

Appl. No.:

11/705926

Inventors:

John Richard DeSalvo - Satellite Beach FL, US
Geoffrey Lynn Burdge - Merritt Island FL, US
Bruce W. FitzGerald - Vail AZ, US
Andreas Leven - Gillette NJ, US
Peter Delfyett - Geneva FL, US

Assignee:

Harris Corporation - Melbourne FL
Lucents Technologies Inc. - Murray Hills NJ
University of Central Florida Foundations, Inc. - Orlando FL

International Classification:

G01J 3/28

US Classification:

356300

Abstract:

A method is provided for identifying a contaminant in a gaseous space. The method includes: generating a broadband optical waveform; shaping the optical waveform to match an expected waveform for a known contaminant; and transmitting the shaped optical waveform towards an unknown contaminant. Upon receiving a reflected optical waveform from the unknown contaminant, determining whether the unknown contaminant correlates to the known contaminant based on the reflected waveform.

US Patent:

20020141041, Oct 3, 2002

Filed:

Aug 10, 2001

Appl. No.:

09/928241

Inventors:

David Payne - Hamble, GB
Shaif-Ul Alam - Southampton, GB
Geoffrey Burdge - Merritt Island FL, US
Anatoly Grudinin - Southampton, GB

International Classification:

H01S003/00

US Classification:

359/337000

Abstract:

A method of an apparatus for compensating optical non-linearity in optical devices and transmission systems. Two second order interactions are cascaded in phase-mismatched second harmonic generation to accumulate a non-linear phase shift of a fundamental wave. The non-linear phase shift can be set to provide a desired amount of non-linearity compensation. Compensation takes place in a compensating medium having a negative effective non-linear refractive index at the design operating conditions of the compensating medium. Compensators incorporating these principles may be incorporated as passive or active components in optical transmitters, repeaters or receivers. Active components may be tuned by varying the operating condition of the compensating medium, for example by controlling temperature or applied stress. Embodiments of the invention use the compensator as pre- or post-compensators in an optical amplifier, to eliminate or reduce self-phase modulation in the optical amplifier that occurs as a result of the Kerr effect.

US Patent:

20110284728, Nov 24, 2011

Filed:

May 18, 2010

Appl. No.:

12/781941

Inventors:

Geoffrey L. Burdge - Merritt Island FL, US
Gus W. Deibner - Melbourne FL, US

International Classification:

H01J 3/14

US Classification:

250216

Abstract:

An imaging system () is provided. The system includes a second harmonic generator () for receiving a source photon beam of a first wavelength and generating a sensor photon beam of the first wavelength and a pump photon beam of a second wavelength that is one half of the first wavelength. The system also includes an amplifier () for receiving a signal photon beam and the pump photon beams and producing an amplified photon beam of the first wavelength, where a number of photons in the amplified photon beam being greater a number of photons in the signal photon beam and the signal photon beam includes a portion of the sensor photon beam reflected from a target (). The system further includes at least one photon counter () configured to receive and detect at least a portion of the photons in the amplified photon beam.

US Patent:

6415079, Jul 2, 2002

Filed:

Mar 3, 2000

Appl. No.:

09/519382

Inventors:

Geoffrey L. Burdge - Edgewater MD
Benjamin J. Eggleton - Summit NJ
Thomas A. Strasser - Warren NJ
Paul S. Westbrook - Chatham NJ
Robert S. Windeler - Annadale NJ

Assignee:

Fitel USA Corp. - Norcross GA

International Classification:

G02B 634

US Classification:

385 37

Abstract:

The present invention is predicated on applicants discovery that an appropriately spaced and dimensioned internal gap cladding can substantially reduce short wavelength cladding mode loss in a fiber Bragg grating. A fiber Bragg grating is provided with a ring of closely spaced, longitudinally extending gap regions in the glass peripherally surrounding the core. The gaps are spaced apart by thin glass webs having a thickness less than a wavelength of the light being transmitted and are disposed peripherally about the core at a distance of 2-10 wavelengths from the core center. The thin webs limit the passage of the light between the gaps. The combination of webs and gaps acts as an internal thin cladding which supports fewer cladding modes than conventional glass cladding and, significantly, provides increased wavelength spacing between the Bragg resonance and the first cladding mode resonance.

US Patent:

20140241731, Aug 28, 2014

Filed:

Feb 28, 2013

Appl. No.:

13/780489

Inventors:

- Melbourne FL, US
Geoffrey L. Burdge - St. Petersburg FL, US
Terry Tidwell - West Fork AR, US
John Grady Vickers - Fayetteville AR, US

Assignee:

HARRIS CORPORATION - Melbourne FL

International Classification:

H04B 10/11

US Classification:

398128, 398139

Abstract:

A free space optical communication system () including first and second mono-static transceivers (). Each transceiver () includes a reflective assembly () defining a reflective surface () about a receiving end of a respective optical fiber () and configured to reflect optical signals () within a field of view of the transceiver () as a modulated retro-reflective signal (). Each mono-static transceiver () includes an acquisition system () configured to detect a modulated retro-reflective signal () and adjust the alignment of the respective transceiver () in response to a detected modulated retro-reflective signal (). A mono-static transceiver and a method of aligning a mono-static transceiver are also provided.