复杂空间结构矢量光场是当前光场调控领域的重要研究内容。作为一类基于椭圆坐标系的本征激光场,Ince-Gaussian(IG)光场比Laguerre-Gaussian和Hermite-Gaussian两类本征光场具有更丰富的空间自由度,是构建复杂空间结构矢量光场的基本光场之一。基于正交偏振IG偶模和奇模的空间叠加理论,通过空间光调制器分离调控偶模和奇模光场,系统地研究了不同阶数下正交偏振IG模式叠加生成的不同空间结构的IG矢量光场。对获取的矢量光场进行分析,并与理论模拟的结果进行对比,验证了并联分离调控产生IG矢量光场的可行性。

The vector optical field with complex spatial structure plays an important role in the manipulation of the optical fields. As one of the eigen laser fields in the elliptic coordinate system, Ince-Gaussian (IG) field has richer spatial degrees of freedom than Laguerre-Gaussian beam and Hermite-Gaussian beam, and it is one of the fundamental fields to construct a complex vector optical field. This work is based on the theory of spatial superposition of the orthogonal polarized even and odd IG modes. IG vector optical fields with different orders and spatial structures are generated by a spatial light modulator which modulate the even and odd modes separately. Experimental results are studied and compared with the simulated results. The results demonstrate the feasibility of generating IG vector optical fields by dual modulation and parallel measurement.