Residual amplitude modulation cancellation in passive resonant fiber optic gyroscope

Maxime Descampeaux; Gilles Feugnet; Fabien Bretenaker

doi:10.1117/12.2608101

2 March 2022 Residual amplitude modulation cancellation in passive resonant fiber optic gyroscope

Maxime Descampeaux, Gilles Feugnet, Fabien Bretenaker

Proceedings Volume 12016, Optical and Quantum Sensing and Precision Metrology II; 120160R (2022) https://doi.org/10.1117/12.2608101
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

In a resonator fiber optic gyroscope (RFOG), a residual amplitude modulation (RAM) may appear with the light phase modulation used to generate the error signals, which are necessary for locking the frequency of the laser on the optical cavity resonance and measure the angular velocity. The RAM causes an unstable bias on the resonance frequency measurement and thus limits the gyro performances. A well-known method to suppress the RAM was introduced by Wong and Hall in 1985. The intensity of the modulated beam is monitored, before entering the resonator, to generate a continuous voltage controlling the natural birefringence of the modulator crystal. We show that this technique seems to be not adapted to setup with an imperfect polarizer (having a limited extinction ratio) at the output of phase modulator followed by component exhibiting polarization dependent losses. To counter this limit, we propose a new strategy and we illustrate its effectiveness with two types of phase modulator to probe a cavity resonance in transmission and reflection.

Conference Presentation

Citation Download Citation

Maxime Descampeaux, Gilles Feugnet, and Fabien Bretenaker "Residual amplitude modulation cancellation in passive resonant fiber optic gyroscope", Proc. SPIE 12016, Optical and Quantum Sensing and Precision Metrology II, 120160R (2 March 2022); https://doi.org/10.1117/12.2608101

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