Christopher Lane Allen

Address:

506 W 86 St, Kansas City, MO 64114

VIN:

3TMKU4HN7BM027622

Make:

TOYOTA

Model:

TACOMA

Year:

2011

US Patent:

6781679, Aug 24, 2004

Filed:

Nov 19, 2002

Appl. No.:

10/299675

Inventors:

Douglas Lew Richards - Stilwell KS
Christopher Thomas Allen - Independence MO
Douglas C. Hague - Shawnee Mission KS

Assignee:

Sprint Communications Company, L.P. - Overland Park KS

International Classification:

G01N 2100

US Classification:

356 731

Abstract:

A system identifies a polarization-mode dispersion (PMD) event in an optical fiber by determining error conditions in proximate wavelengths. The system includes an optical interface and a PMD identification system. The optical interface receives an optical signal from the optical fiber wherein the optical signal is wavelength division multiplexed with a plurality of wavelengths. The PMD identification system determines whether a first error condition exists in a first one of the wavelengths of the optical signal. The PMD identification system also determines whether a second error condition exists in a second one of the wavelengths of the optical signal wherein the second one of the wavelengths is proximate to the first one of the wavelengths. The PMD identification system also determines whether an acceptable condition exists in a third one of the wavelengths of the optical signal that is not proximate to the first one and the second one of the wavelengths of the optical signal. The PMD identification system then determines the presence of the polarization-mode dispersion event in the optical fiber based on the first error condition, the second error condition, and the acceptable condition.

US Patent:

6999688, Feb 14, 2006

Filed:

Dec 20, 2001

Appl. No.:

10/027966

Inventors:

Rongqing Hui - Leneza KS, US
Christopher T. Allen - Independence MO, US
Kenneth Robert Demarest - Lawrence KS, US

Assignee:

Sprint Communications Company L.P. - Overland Park KS

International Classification:

H04B 10/06

US Classification:

398205, 398206, 398209

Abstract:

A receiver system processes a received optical signal that carries user information. The receiver system includes a splitter, a first converter, a second converter, and a detection system. The splitter splits the received optical signal based on polarization into a first optical signal and a second optical signal. The first converter converts the first optical signal into a corresponding first electrical signal. The second converter also converts the second optical signal into a corresponding second electrical signal. The detection system applies radio frequency detection to the first electrical signal to generate a third electrical signal. The detection system applies radio frequency detection to the second electrical signal to generate a fourth electrical signal. The detection system then combines the third electrical signal and the fourth electrical signal to form a fifth electrical signal that carries the user information.

US Patent:

7221871, May 22, 2007

Filed:

Jul 17, 2003

Appl. No.:

10/621858

Inventors:

Douglas Lew Richards - Stilwell KS, US
Christopher Thomas Allen - Lawrence KS, US
Douglas Charles Hague - Overland Park KS, US
Mark Loyd Jones - Overland Park KS, US

Assignee:

Sprint Communications Company L.P. - Overland Park KS

International Classification:

H04J 14/02

US Classification:

398 81, 398147, 398152

Abstract:

A monitoring system is described that is comprised of a processing system and a database system. The database system is configured to store identities for a plurality of channels in the communication network. The processing system identifies an error on a first channel of the plurality of channels. The processing system identifies a second channel of the plurality of channels that is adjacent to the first channel based on the database system and determines if an error occurs on the second channel. The processing system identifies a third channel of the plurality of channels based on database system and determines if an error occurs on the third channel. The processing system identifies polarization-mode dispersion based on determining the error occurs on the second channel and determining the error does not occur on the third channel.

US Patent:

20020071109, Jun 13, 2002

Filed:

Jul 24, 2001

Appl. No.:

09/912729

Inventors:

Christopher Allen - Independence MO, US
Sivaprasad Gogineni - Lawrence KS, US

International Classification:

G01C003/08

US Classification:

356/005010

Abstract:

A laser radar system and method use a reference signal that is impressed on an optical carrier for transmission as a transmit signal. When the transmit signal is reflected or otherwise scattered by a target and returned to the laser radar system as a receive signal, the receive signal is received and processed to remove the optical carrier component of the receive signal to result in a radio frequency (RF) carrier signal. The RF carrier signal is processed to obtain an RF envelope. The RF envelope is processed with the reference signal to determine a difference frequency between the reference signal and the RF envelope. The resultant difference frequency is proportional to the delay period between the time the transmit signal was generated and the receive signal was received. By using the difference frequency, and thereby using the delay, the range between the laser radar system and the target can be determined.

US Patent:

20080131133, Jun 5, 2008

Filed:

May 17, 2007

Appl. No.:

11/750080

Inventors:

Shannon D. Blunt - Shawnee KS, US
Daniel D. Deavours - Lawrence KS, US
Christopher T. Allen - Lawrence KS, US

International Classification:

H04B 10/00

US Classification:

398128

Abstract:

A method and system for a device to embed a low signal to interference plus noise ratio (SINR) communications signal into the backscatter of an illuminating signal. The illuminating signal may be acoustic or electromagnetic (EM) such as radio frequency (RF), light, or infrared (IR). The embedded communications signal may be recovered at a desired receiver.

US Patent:

59701889, Oct 19, 1999

Filed:

Jun 20, 1997

Appl. No.:

8/879527

Inventors:

Lawrence James Pelz - Lenexa KS
Helin Ji - Lawrence KS
Xiaojun Fang - Lawrence KS
Christopher Thomas Allen - Independence MO
Kenneth Robert Demarest - Lawrence KS
Victor Samuel Frost - Lawrence KS

Assignee:

Sprint Communications Company L.P. - Kansas City MO

International Classification:

G02B 626
G01B 902

US Classification:

385 27

Abstract:

The invention is a method and apparatus that provides for the control of optical signals in a polarization-independent manner using birefringence. The invention includes an optical coupler connected to a birefringence element by an optical path loop. The optical coupler and optical path loop could be a Sagnac interferometer. The birefringence element affects the phase velocity of optical signals based on a control signal, and it can introduce a relative phase shift between optical signals propagating around the loop. The optical signals can be routed based on this phase shift.