Error characteristics of magnetic field in depolarized interferometric fiber optic gyroscope

Lihui Wang; Yuping Lu; Yang Xu; Zhixin Yang; Lei Zhao

doi:10.1117/1.3449111

1 June 2010 Error characteristics of magnetic field in depolarized interferometric fiber optic gyroscope

Lihui Wang, Yuping Lu, Yang Xu, Zhixin Yang, Lei Zhao

Author Affiliations +

Optical Engineering, Vol. 49, Issue 6, 064402 (June 2010). https://doi.org/10.1117/1.3449111

Abstract

Random residual circular birefringence induced by a twist of single-mode fiber is the main cause of magnetic field Faraday phase error in depolarized interferometric fiber optic gyroscopes (D-IFOGs). Magnetic field Faraday phase error in D-IFOG includes both radial and axial phase errors; however, axial phase error has not been thoroughly researched and is usually neglected. A magnetic phase error model of D-IFOG along a radial direction is established by using a Jones matrix; then, the mathematical description of radial direction phase drift in D-IFOG is deduced according to the model. Based on a quadrupolar winding distribution structure in a fiber loop, a magnetic phase error model of D-IFOG along the axial direction is established, and phase drift in D-IFOG is deduced by using a coil expansion method. Theoretical analysis shows that nonreciprocal phase error in D-IFOG induced by magnetic field correlates with several factors, such as optical coherent length, optical polarization degree, etc. Then, measures to restrain the magnetic field phase error in D-IFOG are investigated, such as the new Lyot depolarizer, electromagnetic shielding, etc. Further, we experimentally present the performance of D-IFOG with the magnetic intensity of 150 Gs along axial and radial directions, respectively, and verify the effect of a new Lyot depolarizer on restraining magnetic phase error in D-IFOG.

©(2010) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Lihui Wang, Yuping Lu, Yang Xu, Zhixin Yang, and Lei Zhao "Error characteristics of magnetic field in depolarized interferometric fiber optic gyroscope," Optical Engineering 49(6), 064402 (1 June 2010). https://doi.org/10.1117/1.3449111

Published: 1 June 2010

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available