Bias-instability reduction in fiber optic gyroscopes

Details Bias-instability reduction in fiber optic gyroscopes Bias-instability reduction in fiber optic gyroscopes

2011-02-22

2011-02-22

Connolly, Patrick J (Department: 2877)

Optics: measuring and testing

By light interference

Rotation rate

Reexamination Certificate

active

07894073

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 d1, a second pigtail with length of d2, and a third pigtail with length of d3; 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, d1and d3are proportioned to avoid regions of high bias instability.

REFERENCES:
patent: 5031988 (1991-07-01), Okada
patent: 5260768 (1993-11-01), Cordova et al.
patent: 5327213 (1994-07-01), Blake
patent: 5365338 (1994-11-01), Bramson
patent: 5386290 (1995-01-01), Okada
patent: 5602642 (1997-02-01), Bergh et al.
patent: 5767970 (1998-06-01), Cordova
patent: 5818590 (1998-10-01), Patterson
patent: 5847829 (1998-12-01), Cordova
patent: 6040908 (2000-03-01), Rahn
patent: 6801319 (2004-10-01), Szafraniec et al.
patent: 6978056 (2005-12-01), Tavlykaev
patent: 7317847 (2008-01-01), Wang
patent: 2007/0097374 (2007-05-01), Ren-Young
patent: 2010/0033729 (2010-02-01), Qiu

Affiliated with

Also associated with

Rating

Bias-instability reduction in fiber optic gyroscopes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bias-instability reduction in fiber optic gyroscopes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bias-instability reduction in fiber optic gyroscopes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2636016