Bias error and its thermal drift due to fiber birefringence in interferometric fiber-optic gyroscopes

Abstract

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Analytical Estimation of Stress-Induced Birefringence in Panda-Type Polarization-Maintaining Fibers

“…HE intrinsic stress-induced birefringence (SIB) in polarization-maintaining optical fibers (PMFs) is one of the most crucial characteristics in several applications, e.g. fiber optic sensing [1], loop mirror [2], current transformers [3], acoustic-optic modulators [4] and gyroscopes [5]. The SIB in PMFs originates from the stress difference between two principal axes, produced by embedded stress-applying parts (SAPs) via the difference between the coefficient of thermal expansion (CTE) in SAPs and that in the fiber cladding [6].…”

Revisiting the Stress-Induced Birefringence in Polarization-Maintaining Fibers

“…The stress-induced birefringence (SIB) which is intrinsic in PMFs is usually very high [6], [7], which enables the fiber to be immune to external perturbations [8], [9]. The SIB critically affects the polarization-maintaining capability of PMFs and hence the performance of systems using PMFs [10], [11]. Generally, the better performance comes from the higher SIB of the fiber, which has already become one of the main targets in the design and fabrication of PMFs [12].…”

Theoretical analysis of the non-reciprocal phase shifts due to birefringence and topology in fiber ring interferometers

“…One is the intrinsic perturbations such as polarization cross-couplings in fibers [7,8] and splicing misalignments between fibers [9,10]. The other is the external perturbations from surrounding environments such as thermal fields [11][12][13], magnetic fields [14][15][16], and thermal stress fields [17][18][19]. Another new type of error source identified recently is the topology of the optical circuit formed in the coiled fiber [20][21][22][23][24].…”