Determination of induced birefringence in a fiber-optic resonator from the frequency difference between main and additional resonance peaks

Abstract

When radiation propagates in an optical ring resonator, apart from the main peaks, additional peaks are observed. It is known that the strain of optical fiber induces birefringence. Assuming that an additional peak is associated with the main peak, we proposed a model describing the relative position of the main and additional resonance peaks. The model predicts induced birefringence based on the frequency difference between the main and additional peaks. For experimental verification, we fabricated an optical ring resonator, measured the difference between the main and additional peaks and obtained the birefringence value. This value was –(3.42 ± 0.51)·10−7, consistent with values obtained in other studies.

A Prototype for a Passive Resonant Interferometric Fiber Optic Gyroscope with a 3 × 3 Directional Coupler

“…Birefringence in the resonator is induced by core deformation caused by fiber bending [ 19 ]. It results in a different propagation velocity of two polarization modes in the fiber and the appearance of an additional resonant peak ( Figure 7 ) [ 20 , 21 , 22 , 23 ].…”

Estimation of the dynamic range of the angular velocity sensor based on a fiber-optic resonator

“…Также данный метод может быть улучшен с помощью применения дополнительного интерферометра в оптической схеме для учета нелинейности перестройки лазера [24,25]. Метод был применен в исследованиях наведенного двулучепреломления в волоконно-оптических резонаторах [26,27].…”