Jan Rugger Martin

US Patent:

7729047, Jun 1, 2010

Filed:

Sep 14, 2007

Appl. No.:

11/855380

Inventors:

Anatoliy A. Savchenkov - Glendale CA, US
Dmitry V. Strekalov - Arcadia CA, US
Lute Maleki - Pasadena CA, US
Andrey B. Matsko - Pasadena CA, US
Vladimir S. Iltchenko - Arcadia CA, US
Jan M. Martin - Altadena CA, US

Assignee:

The United States of America as represented by the Administrator of the National Aeronautics and Space Administration - Washington DC

International Classification:

H01S 3/00

US Classification:

359346, 356480

Abstract:

A method of shifting and fixing an optical frequency of an optical resonator to a desired optical frequency, and an optical resonator made by such a method are provided. The method includes providing an optical resonator having a surface and a refractive index, and obtaining a coating composition having a predetermined concentration of a substance and having a refractive index that is substantially similar to the refractive index of the optical resonator. The coating composition inherently possesses a thickness when it is applied as a coating. The method further includes determining a coating ratio for the surface of the optical resonator and applying the coating composition onto a portion of the surface of the optical resonator based upon the determined coating ratio.

US Patent:

56593180, Aug 19, 1997

Filed:

May 31, 1996

Appl. No.:

8/657602

Inventors:

Soren N. Madsen - Pasadena CA
Paul A. Rosen - La Crescenta CA
David A. Imel - Altadena CA
Scott Hensley - Fullerton CA
Jan M. Martin - Altadena CA
Yunjin Kim - Glendora CA

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

G01S 1390

US Classification:

342 25

Abstract:

An interferometric Synthetic Aperture Radar (SAR) system having a special-purpose processor to integrate motion compensation, interferogram coregistration, and a spectral shifting for optimal interferogram correlation together to achieve efficient, accurate, and robust three-dimensional imaging. A simple radar mapping coordinate system is implemented in the present invention to enhance the overall image processing and in particular to improve the accuracy and efficiency. The present invention substantially improves the fidelity and efficiency of phase unwrapping by incorporating phase-bootstrapping process, a correlation filter, and other processes. Absolute phase determination is implemented without known ground references by two proposed techniques employing cross-correlation of sub-patches to generate a number of estimates within a patch and weighting correlation processes.