Analysis of Kerr effect in resonator fiber optic gyros with triangular wave phase modulation

D. Ying, M. S. Demokan, X. Zhang, Wei Jin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)


We present an in-depth analysis of the Kerr effect in resonator fiber optic gyros (R-FOGs) based on triangular wave phase modulation. Formulations that relate gyro output to the rotation rate, the Kerr nonlinearity, and other fiber and gyro parameters are derived and used to study the effect of Kerr non-linearity on the gyro performance. Numerical investigation shows that the Kerr effect results in a nonzero gyro output even when the gyro is at stationary, which is interpreted as an error in the measurement of rotation rate. This error was found to increase as the frequencies of the two triangular phase modulations deviate from each other, and is not zero even ifthe intensities ofthe two counterpropagating beams are exactly the same. For fixed frequencies of the triangular phase modulations, there exists an optimal intensity splitting ratio for the two counterpropagating beams, which leads to zero gyro error. Calculation shows that the measurement error due to the Kerr effect for an R-FOG with a hollow-core photonic bandgap fiber as the fiber loop can be one to two orders of magnitude smaller than an R-FOG with a conventional single mode fiber loop.
Original languageEnglish
Pages (from-to)529-535
Number of pages7
JournalApplied Optics
Issue number3
Publication statusPublished - 20 Jan 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Analysis of Kerr effect in resonator fiber optic gyros with triangular wave phase modulation'. Together they form a unique fingerprint.

Cite this