Abstract
In this chapter, two kinds of dual-polarization IFOGs are designed and experimentally tested, and the phenomenon of polarization nonreciprocity (PN) error compensation between two polarizations is observed. The experimental structures ensure that two polarizations are independent for rotation sensing. The two polarization states undergo polarizing, splitting, traveling through the fiber loop, and interfering, respectively. As the two optical waves are subjected to the same fiber loop, there is unavoidable coupling. Hence, the error components in two detection signals are correlated. Experimental results show that a large part of the error components between two signals are just opposite. It is then proved that this part of error is the PN error introduced by polarization coupling. A mathematical model is established for analyzing the dual-polarization PN error compensation. A conclusion has been arrived that the PN errors in dual-polarization IFOGs can be compensated by superimposition.
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Wang, Z. (2017). Polarization Error Compensation in Dual-Polarization IFOGs. In: Dual-Polarization Two-Port Fiber-Optic Gyroscope. Springer Theses. Springer, Singapore. https://doi.org/10.1007/978-981-10-2836-6_2
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DOI: https://doi.org/10.1007/978-981-10-2836-6_2
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