Abstract
AbstractAn analysis and experimental results are described for the automatic polarization control of the polarization plane of the output light from a single‐mode fiber with a standard axisymmetric core. This automatic polarization control device consists of two phase shifters made of z‐cut LiNbO3 exhibiting the electrooptic effect. The phase shifters are oriented with their transverse planes inclined to each other. The state of the polarization is detected by two Rochon prisms and is fed back to the phase shifters. The analysis has been done for the change of the polarization of the incident light in the polarization control device. The range of the voltage applied to the phase shifter for the control and the condition of the angle between the phase shifters are clarified. Next, experiments have been performed and the single polarization control in the desired direction has been attained. A proposal is made to simplify the control mechanism.
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