Fiber optic gyroscope interrogated with three multiplexed broadened semiconductor lasers

Hongxiang Jia; Taylor Iantosca; Jonathan Wheeler; Michel J. F. Digonnet

doi:10.1117/12.2678384

23 May 2023 Fiber optic gyroscope interrogated with three multiplexed broadened semiconductor lasers

Hongxiang Jia, Taylor Iantosca, Jonathan Wheeler, Michel J. F. Digonnet

Proceedings Volume 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023); 126430B (2023) https://doi.org/10.1117/12.2678384
Event: European Workshop on Optical Fibre Sensors (EWOFS 2023), 2023, Mons, Belgium

Abstract

We report the best noise and drift ever achieved by a laser-driven FOG, namely an angular random walk of 368 μdeg/√h and a drift of 6.66 mdeg/h. This improvement was achieved by interrogating the 3-km Sagnac interferometer of the FOG with a low-coherence light source consisting of three lasers broadened by the same noise-driven phase modulator, which further reduces the temporal coherence compared to a single broadened laser. Proper optical gating is also applied to suppress the residual drift due to the Kerr effect. The experimental results agree well with our prediction that both the noise and the drift improve as the square root of the number of lasers. Using multiple lasers also improves the mean-wavelength stability of the light source compared to a single laser. Thanks to the low cost of semiconductor lasers, this technique is a promising and cost-effective solution that can be easily extended to a larger number of lasers for further reduction of the noise and drift in high-accuracy FOGs.

Citation Download Citation

Hongxiang Jia, Taylor Iantosca, Jonathan Wheeler, and Michel J. F. Digonnet "Fiber optic gyroscope interrogated with three multiplexed broadened semiconductor lasers", Proc. SPIE 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023), 126430B (23 May 2023); https://doi.org/10.1117/12.2678384

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