Integrated optical chip in fiber optic gyros

Vardhani Chunduru; R. VaraLakshmi; . Dhanunjay; . Karthik

doi:10.1117/12.842823

11 February 2010 Integrated optical chip in fiber optic gyros

Vardhani Chunduru, R. VaraLakshmi, . Dhanunjay, . Karthik

Proceedings Volume 7604, Integrated Optics: Devices, Materials, and Technologies XIV; 760415 (2010) https://doi.org/10.1117/12.842823
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

Fiber optic gyroscope is an important development in the field of fiber optic sensors. It is now considered an alternative technology to the mechanical and laser gyroscopes for the inertial guidance and control applications. The advantages of FOG over mechanical gyroscopes are many like instantaneous operation, wide dynamic range, no g-sensitivity, maintenance free, and capability to withstand high shock and vibration and so on. The advantages over laser gyroscopes include cost effectiveness, light weight, low power consumption and improved ruggedness. The optical gyroscope principle was first demonstrated by Sagnac in 1913. Optical gyroscopes implemented so far use Sagnac effect, which states that an optical path difference induced by counter propagating beams in a rotating reference frame is proportional to the absolute rotation. The main requirement of a FOG is perfect reciprocity, i.e. in the absence of rotation, the counter propagating beams inside the fiber must travel identical paths thus resulting in zero phase shift. The phase shift in a Sagnac interferometer not only comprises of a non-reciprocal sources that set practical performance limits. These non-reciprocal sources generate random time varying output resulting in a bias drift even under zero rotation rates, which causes serious problems in present day gyroscope. In a FOG the reciprocal configuration ensures the bias stability, signal processing is used to obtain maximum sensitivity, a broad band source is used to eliminate the effect of back scattering, polarization coupling and Kerr effect and the closed loop operation is used to linearize the scale factor and improve its stability.

Citation Download Citation

Vardhani Chunduru, R. VaraLakshmi, . Dhanunjay, and . Karthik "Integrated optical chip in fiber optic gyros", Proc. SPIE 7604, Integrated Optics: Devices, Materials, and Technologies XIV, 760415 (11 February 2010); https://doi.org/10.1117/12.842823

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