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:
Feb. 22, 2011
Filed:
Aug. 02, 2010
Tiequn Qiu, Glendale, AZ (US);
Steven J. Sanders, Scottsdale, AZ (US);
Sorin Mosor, Peoria, AZ (US);
Glen A. Sanders, Scottsdale, AZ (US);
Tiequn Qiu, Glendale, AZ (US);
Steven J. Sanders, Scottsdale, AZ (US);
Sorin Mosor, Peoria, AZ (US);
Glen A. Sanders, Scottsdale, AZ (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
Apparatus for providing Bias-Instability reduction in Fiber Optic Gyroscopes are provided. In one embodiment, an optical circuit for a fiber optic gyroscope having a broadband light source and an optical fiber loop comprises: a PM fiber of length v; an IOC coupled to the PM fiber via a pigtail of length d, a second pigtail with length of d, and a third pigtail with length of d; a splitter that splits light received from the first pigtail into a first and second beams directed to the second and third pigtails; and a depolarizer circuit coupled to said fiber loop including a first fiber section of length x, a second fiber section of length z, a third fiber section of length w and a fourth fiber section of length y; and wherein the lengths of v, x, y, dand dare proportioned to avoid regions of high bias instability.