High-speed polarization tracking using thin film lithium niobate integrated dynamic polarization controller

Dynamic polarization controllers (DPCs) are essential devices in various optical applications. We develop a thin film lithium niobate (TFLN) integrated DPC driven by the real-time implemented Jacobian control algorithm for fast polarization tracking. Experimental results demonstrate a high polarization tracking speed of 100 krad/s when targeting a specific linear state of polarization, with a low control loop delay of 420 ns, half-wave control voltages of 2.75 V, and a fast polarization restoring time of 1.6 us. Compared to previously reported integrated DPCs, the TFLN-based DPC achieves significantly higher tracking speed and lower loop delay. The results highlight the effectiveness of the Jacobian method and the outstanding performance of TFLN-based DPCs. The study opens up possibilities for further advancements in DPC solutions using TFLN technology.

Automated summary

This study developed a thin film lithium niobate (TFLN) integrated dynamic polarization controller (DPC) based on the real-time implemented Jacobian control algorithm, achieving fast polarization tracking. Experimental results showed that the TFLN-based DPC had a high tracking speed, low loop delay, and superior performance compared to previously reported integrated DPCs. The study highlights the effectiveness of the Jacobian method and opens up possibilities for further advancements in DPC solutions using TFLN technology.