光纤耦合系统中角位移台耦合误差建模与修正OA

Angle-displacement coupling errors introduced by angular stages during adjustment remain a critical issue in precision single-mode fiber coupling systems,leading to fluctuations in coupling efficiency and reduced stability.To address this problem,modeling and decoupling compensation of angle-displace-ment coupling errors are investigated.The analysis is based on mode field overlap theory between a Gauss-ian beam and the fundamental mode of a single-mode fiber.ZEMAX simulations are employed to examine the combined effects of angular tilt and lateral misalignment on coupling efficiency.A high-precision cali-bration platform for angle-displacement characterization is established to acquire coupling error data.An error model of the angular stage is constructed by integrating the Total Least Squares method with a Genet-ic Algorithm,enabling accurate characterization of the coupling relationship between angular motion and equivalent lateral displacement.The model is subsequently incorporated into the automatic fiber coupling process,where the lateral displacement induced by angular adjustment is decoupled and compensated in re-al time.Experimental results demonstrate that,compared with the uncompensated case,the proposed method reduces the average alignment time by approximately 71%and increases the average coupling effi-ciency by about 22%.The method effectively suppresses angle-displacement coupling errors introduced by the angular stage,thereby enhancing both stability and efficiency.This approach provides a practi-cal and robust solution for high-precision optical alignment systems in which multi-axis coupling effects are significant.