Keith Edward Wilson

US Patent:

48909220, Jan 2, 1990

Filed:

Feb 27, 1989

Appl. No.:

7/316183

Inventors:

Keith E. Wilson - Arcadia CA

Assignee:

Litton Systems, Inc. - Beverly Hills CA

International Classification:

G01B 902

US Classification:

356350

Abstract:

A first birefringent material is positioned to receive an optical signal output from an optical source. A second birefringent material is positioned to receive the signal transmitted through the first birefringent material. The birefringence of the first birefringent material is modulated to produce a modulation in the phase difference between two polarizations propagated between the birefringent materials. A detector forms an electrical signal indicative of the phase shift produced by the first and second birefringent materials between a pair of orthogonal polarizations in the optical signal received by the first birefringent material. This phase shift is opposite to phase shifts caused by changes in the source wavelength. A feedback signal indicative of the hase shift caused by the crystals is fed back to the optical source to stabilize its frequency. The system produces a temperature-independent phase shift between the two polarizations by means of proper selection of the lengths of the crystals in the optical path.

US Patent:

50088890, Apr 16, 1991

Filed:

Nov 6, 1989

Appl. No.:

7/432581

Inventors:

Keith E. Wilson - Arcadia CA

International Classification:

H01S 313

US Classification:

372 32

Abstract:

An angled-stripe superluminescent laser diode (SLD) light source emits both coherent and incoherent radiation simultaneously, but the two beams are separated spatially. A method and apparatus for stabilizing the emission wavelength of a broadbent light source for a fiber-optic rotation-sensing gyro uses the coherent radiation from an angled-stripe SLD as the optical source in a large-optical-pathlength-difference interferometer to generate an error signal which is fed back to the current source of the SLD to stabilize the wavelength of the incoherent part of the SLD light output.

US Patent:

50346032, Jul 23, 1991

Filed:

Nov 6, 1989

Appl. No.:

7/432517

Inventors:

Keith E. Wilson - Arcadia CA

International Classification:

H01J 516

US Classification:

25022727

Abstract:

An integrated-optics wavelength stabilization device for broad-bandwidth optical sources requires small-optical-path-difference interferometers to detect wavelength shifts. The phase retardation between the arms of the interferometer is modulated using small applied AC voltages.

US Patent:

20150125157, May 7, 2015

Filed:

Nov 4, 2014

Appl. No.:

14/532953

Inventors:

- Pasadena CA, US
Keith E. Wilson - El Monte CA, US
Keith Coste - La Crescenta CA, US

Assignee:

CALIFORNIA INSTITUTE OF TECHNOLOGY - Pasadena CA

International Classification:

H04B 10/118

US Classification:

398122

Abstract:

A method, systems, apparatus and device enable high bandwidth satellite communications. An onboard tracking detector, installed in a low-earth orbit satellite, detects a position of an incoming optical beam received/transmitted from a first ground station of one or more ground stations. Tracker electronics determine orientation information of the incoming optical beam based on the position. Control electronics receive the orientation information from the tracker electronics, and control a waveguide drive electronics. The waveguide drive electronics control a voltage that is provided to an electro-optic waveguide beam steering device. The electro-optic waveguide beam steering device steers an outgoing optical beam to one of the one or more ground stations based on the voltage.

Address:

12201 Mulhall St, El Monte, CA 91732

Phone:

6264428672

VIN:

1HGCP3F81BA023647

Make:

HONDA

Model:

ACCORD

Year:

2011