Steven Robert Shepherd

US Patent:

6826327, Nov 30, 2004

Filed:

Dec 18, 2001

Appl. No.:

10/024905

Inventors:

Chang-Hee Lee - Taejon, KR
Wayne V. Sorin - Mountain View CA
Steven L. Shepherd - Monte Sereno CA

Assignee:

Novera Optics, Inc. - Palo Alto CA

International Classification:

G02B 626

US Classification:

385 28, 385 29, 385 7

Abstract:

A method, an apparatus and a system are described for receiving an optical signal in an optical filter and routing the optical signal through the optical filter multiple times.

US Patent:

20020003915, Jan 10, 2002

Filed:

Dec 4, 2000

Appl. No.:

09/729661

Inventors:

Wayne Sorin - Mountain View CA, US
Pavel Polynkin - Fremont CA, US
Steven Shepherd - Monte Sereno CA, US

International Classification:

G02F001/335
G02B006/26

US Classification:

385/007000, 385/028000

Abstract:

An acousto-optic filter includes an optical fiber with a first region and a second region. A first acoustic wave generator is coupled to optical fiber. The first acoustic wave generator produces a first acoustic wave that travels in a first direction in the first region. A backward-propagating wave is generated in response to propagation of the first acoustic wave along the optical fiber. The backward-propagating wave travels in an opposite direction relative to the first acoustic wave. A first acoustic wave propagation member is coupled to the optical fiber. A second acoustic wave generator is coupled to the optical fiber at the second region. The second acoustic wave generator produces a second acoustic wave that combines with the backward propagating acoustic wave.