The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 1991
Filed:
Mar. 22, 1990
Anthony W Lawrence, Walpole, MA (US);
Joseph J Danko, Franklin, MA (US);
Northrop Corporation, Hawthorne, CA (US);
Abstract
Method and apparatus for tuning an optical gyroscope, such as a MOG, to an operating frequency within a predetermined range of operating frequencies. The method includes an initial step of providing a compound resonator structure having a first optical waveguide resonator [16] optically coupled to a laser [14]. There is also provided a second optical waveguide resonator [18] optically coupled to the first resonator. The second resonator is constructed to extract a significant amount of energy from the first resonator when a coresonance frequency condition exists with the first resonator and to extract an insignificant amount of energy from the first resonator when a coresonance frequency condition does not exist. The method includes a step of varying an output frequency of the laser to a first frequency where a coresonance frequency condition exists. The method also includes a step of further varying the output frequency of the laser to a second frequency where a resonance frequency condition exists within the first resonator and a coresonance frequency condition does not exist between the first and the second resonators. The second frequency is within the predetermined range of frequencies and is selected to provide a desired gyroscope scale factor.