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Automatic endless polarization control with integrated-optical Ti:LiNbO_3 polarization transformers

1988; Optica Publishing Group; Volume: 13; Issue: 6 Linguagem: Inglês

10.1364/ol.13.000527

1539-4794

R. Noé, H. Heidrich, D. Hoffmann,

Magneto-Optical Properties and Applications

In coherent-optical transmission systems continuous or endless polarization matching between the superposed beams must be ensured. We describe a practical closed-loop polarization-control system with two integrated-optical retarders acting as polarization transformers. They have variable retardations and variable eigenmodes, i.e., adjustable birefringence magnitude and orientation as in a Babinet–Soleil compensator. In theory, one retarder would be sufficient. However, a second device is added to correct nonideal behavior of the first. The intensity losses during polarization control are less than 0.15 dB.