William L Kath

US Patent:

6462849, Oct 8, 2002

Filed:

Sep 10, 1998

Appl. No.:

09/151387

Inventors:

William L. Kath - Evanston IL
Sergei K. Turitsyn - Dusseldorf, DE

Assignee:

Northwestern University - Evanston IL

International Classification:

H04B 1000

US Classification:

359161, 385 24

Abstract:

There is described an asymptotic theory for predicting the evolution of dispersion-managed solitons with loss and gain. Optimal launch points for dispersion-managed solitons where the pulses do not need to be prechirped can be readily located. Numerical results demonstrate that launching the pulses with proper phase chirp and power significantly reduces pulse amplitude and width oscillations and the amount of dispersive radiation, without regard to wavelength.

US Patent:

7068896, Jun 27, 2006

Filed:

Feb 7, 2003

Appl. No.:

10/360303

Inventors:

William L. Kath - Evanston IL, US
Gino Biondini - Columbus OH, US
Sarah L. Fogal - Nashua NH, US

Assignee:

Northwestern University - Evanston IL

International Classification:

G02B 6/00
G02B 6/17
H04J 14/06

US Classification:

385123, 385 11, 385122, 398 65, 398 81

Abstract:

A method and a system to produce, either in numerical simulations or in experiments, specified amounts of first, second and higher order PMD in a controlled manner, in particular large amounts. Parameters can be adjusted to obtain specific ranges of first, second and higher order PMD, and importance sampling can be used to determine the probability that the resulting PMD events can be obtained in realistic situations. Individual results obtained using specific parameter values can be combined to produce even larger ranges of PMD.

US Patent:

7289708, Oct 30, 2007

Filed:

Jun 26, 2006

Appl. No.:

11/474696

Inventors:

William L. Kath - Evanston IL, US
Gino Biondini - Columbus OH, US
Sarah L. Fogal - Nashua NH, US

Assignee:

Northwestern University - Evanston IL

International Classification:

G02B 6/00
G02B 6/17
H04J 14/06

US Classification:

385123, 385 11, 385122, 398 65, 398 81

Abstract:

A method and a system to produce, either in numerical simulations or in experiments, specified amounts of first, second and higher order PMD in a controlled manner, in particular large amounts. Parameters can be adjusted to obtain specific ranges of first, second and higher order PMD, and importance sampling can be used to determine the probability that the resulting PMD events can be obtained in realistic situations. Individual results obtained using specific parameter values can be combined to produce even larger ranges of PMD.

US Patent:

61953695, Feb 27, 2001

Filed:

Oct 24, 1997

Appl. No.:

8/959532

Inventors:

Prem Kumar - Skokie IL
Donald L. Sipes - Crystal Lake IL
Douglas W. Anthon - Wheaton IL
William L. Kath - Evanston IL
Darwin K. Serkland - Greenfield WI
Timothy C. Munks - Crystal Lake IL

Assignee:

Scientific-Atlanta, Inc. - Norcross GA

International Classification:

H01S 317

US Classification:

372 26

Abstract:

A highly stable soliton source uses a bulk Er/Yb glass laser which operates in two longitudinal modes of the laser cavity with substantially identical amplitudes to generate beat modulation. The beat modulation is then passed through a pulse compression fiber which compresses the beat modulation into a train of soliton pulses. Because the beat modulation is between two modes of the same laser cavity, the soliton pulse train generated is highly stable with low timing jitter.