AI 中文总结
研究偏振控制器及其算法，针对现有不足，提出紧凑型确定性液晶偏振控制器，具备低插入损耗等优点，有可预测可重复的偏振调制，实现单次测量直接计算算法，为相关系统偏振管理提供实用方案。
AI 中文摘要
偏振控制器及其控制算法对于补偿偏振敏感光子系统中的环境干扰和保持信号保真度至关重要。然而，现有控制器常常在关键性能指标之间进行权衡，相关控制算法要么收敛效率低，要么需要多次偏振态测量。本文提出了一种具有平衡整体性能的紧凑型确定性液晶偏振控制器，具有低插入损耗（<1dB）、低驱动电压（<6V）和全庞加莱球覆盖等特点。该器件具有高度可预测和可重复的偏振调制，其轨迹法向量与偏振态无关，实现了角度误差低于2°的单次测量直接计算算法。这种紧凑型确定性液晶偏振控制器及其高效控制方案的结合为量子密钥分发、光学传感和先进光子系统中的偏振管理提供了一种实用解决方案。
英文摘要
Polarization controllers (PCs) and their control algorithms are critical for compensating environmental disturbances and maintaining signal fidelity in polarization-sensitive photonic systems. However, existing controllers often involve trade-offs among key performance metrics, while associated control algorithms either converge inefficiently or require multiple state-of-polarization (SOP) measurements. This work presents a compact deterministic liquid-crystal polarization controller (LC-PC) with balanced overall performance, featuring low insertion loss (<1 dB), low driving voltage (<6 V), and full Poincaré sphere coverage. The device exhibits highly predictable and repeatable polarization modulation characterized by SOP-independent trajectory normal vectors, enabling a single-measurement direct-calculation algorithm with an angular error below 2°. The combination of this compact deterministic LC-PC and its efficient control scheme provides a practical solution for polarization management in quantum key distribution, optical sensing, and advanced photonic systems.
