扩束准直光学系统中光学元件失调对高斯光束传输变换的影响分析

Influence of optical element misalignment of beam spread collimation optical system on Gaussian beam propagation and transformation

  • 摘要: 基于广义惠更斯-菲涅尔衍射积分公式, 以高斯光束为激光束模型,推导了激光光束通过失调扩束准直光学系统的传输公式,分析了光学元件失调对扩束准直光学系统输出光束传输特性的影响,并在此基础上进行了仿真。实验结果表明,高斯光束通过失调扩束准直光学系统时,出射光束变为偏心高斯光束,光学元件失调程度越大,输出光束越偏离光轴,光束质量越差。在同样的失调下,长焦距光学元件对输出光束影响更大,因此在激光扩束准直光学系统中,调整长焦距光学元件更为重要。

     

    Abstract: Based on the generalized Huygens-Fresnel diffraction integral, taking Gaussian beam as a laser beam model, the propagation formula is deduced. When the laser beam passes through the misaligned beam spread collimation optical system. The influence of the optical element misalignment on the output beam transmitting properties was analysed and the numerical simulation was carried out based on the analysis. The result shows that the output beam becomes an off axis Gaussian beam and the beam quality becomes worse if the misalignment is greater when Gaussian beam is passing through the misaligned beam spread collimation system. With the same misalignment, long-focus optical elements have greater influence on the output beam. The adjustment of the long-focus optical elements is more important in the beam spread collimation optical systems.

     

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