James G Howe

Address:

316 Brushy Crk Trl, Hutto, TX 78634

Phone:

5127591495

VIN:

2D4GP44L27R313902

Make:

DODGE

Model:

GRAND CARAVAN

Year:

2007

US Patent:

8554035, Oct 8, 2013

Filed:

Oct 26, 2007

Appl. No.:

12/446619

Inventors:

Chris Xu - Ithaca NY, US
James Van Howe - Cortland NY, US
Jennifer Lee - Ithaca NY, US

Assignee:

Cornell Research Foundation, Inc. - Ithaca NY

International Classification:

G02B 6/00
G02B 6/26
G02B 6/42
H01S 3/30
H01S 3/10
G02F 1/35
G02F 2/02

US Classification:

385122, 385 28, 372 6, 372 21, 372 23, 372 25, 359327

Abstract:

The present invention relates to an apparatus for producing optical pulses of a desired wavelength. The apparatus includes an optical pulse source operable to generate input optical pulses at a first wavelength. The apparatus further includes a higher-order-mode (HOM) fiber module operable to receive the input optical pulses at the first wavelength, and thereafter to produce output optical pulses at the desired wavelength by soliton self-frequency shift (SSFS). The present invention also relates to a method of producing optical pulses having a desired wavelength. This method includes generating input optical pulses using an optical pulse source, where the input optical pulses have a first wavelength and a first spatial mode. The input optical pulses are delivered into an HOM fiber module to alter the wavelength of the input optical pulses from the first wavelength to a desired wavelength by soliton self-frequency shift (SSFS) within the HOM fiber module, thereby producing output optical pulses having the desired wavelength.

US Patent:

8556824, Oct 15, 2013

Filed:

Oct 26, 2007

Appl. No.:

12/446617

Inventors:

Chris Xu - Ithaca NY, US
James Van Howe - Davenport IA, US

Assignee:

Cornell Research Foundation, Inc. - Ithaca NY

International Classification:

A61B 10/00
A61B 1/06
A61B 18/18

US Classification:

600562, 600182, 606 15

Abstract:

The present invention relates to an apparatus for producing optical pulses of a desired wavelength. The apparatus includes an optical pulse source operable to generate input optical pulses at a first wavelength. The apparatus further includes a higher order mode (HOM) fiber module operable to receive the input optical pulses at the first wavelength, and thereafter to produce output optical pulses at the desired wavelength by soliton self-frequency shift (SSFS). The present invention also relates to a method of producing optical pulses having a desired wavelength. This method includes generating input optical pulses using an optical pulse source, where the input optical pulses have a first wavelength and a first spatial mode. The input optical pulses are delivered into an HOM fiber module to alter the wavelength of the input optical pulses from the first wavelength to a desired wavelength by soliton self-frequency shift (SSFS) within the HOM fiber module, thereby producing output optical pulses having the desired wavelength.

US Patent:

20050286108, Dec 29, 2005

Filed:

May 6, 2005

Appl. No.:

11/123224

Inventors:

Chris Xu - Ithaca NY, US
James Howe - Cortland NY, US

International Classification:

G02F001/23

US Classification:

359278000

Abstract:

A programmable, ultrafast optical delay line based on reversible frequency conversion uses a time-prism pair and no moving parts. A first electro-optic phase modulator acting as a first time-prism shifts the frequency of an incoming pulse train. The pulse train passes through a dispersion element, such as a dispersive fiber, which delays the pulse train by an amount that is directly proportional to the magnitude of the frequency shift, which in turn is proportional to the magnitude of the phase modulator drive voltage. A second electro-optic phase modulator is driven π out of phase to the first modulator and restores the frequency of the delayed pulse train to the original frequency of the incoming pulse train. To reduce pulse broadening effects and enhance performance further, soliton propagation inducing elements can be employed between the time-prisms.