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Optical Endless Polarization Stabilization at 9 krad/s With FPGA-Based Controller

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7 Author(s)

We demonstrate endless polarization stabilization with a control speed of up to 9 krad/s, over random Poincare sphere trajectories. These are in total >35 Mrad long, are composed in particular of difficult-to-track circles with all radii and orientations, and thereby include all possible worst cases. The maximum polarization mismatch and relative intensity errors are 0.13 rad and 0.43%, respectively. The controller runs on a field-programmable gate array and uses a commercial multistage LiNbO3 polarization transformer as the control device.

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Photonics Technology Letters, IEEE  (Volume:20 ,  Issue: 12 )