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物理学报  2006 

The experimental investigation of orbital angular momentum of complex astigmatic elliptical beams
复杂像散椭圆光束的轨道角动量的实验研究

Keywords: complex astigmatic elliptical beam,orbital angular momentum,measurement
复杂像散椭圆光束
,轨道角动量,测量

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Abstract:

Complex astigmatic elliptical beams possess very high orbital angular momentum. This kind of beams has important applications in many fields, such as atomic physics and biology. An experimental method of optical torsion balance to measure the orbital angular momentum of the beams is presented in this paper. In our experiment, the absorption slice rotates under the irradiation of the beam. The angular momentum of beams is obtained by measuring the rotation angle of the absorption slice. The angular momentum of complex astigmatic elliptical beam with different parameters is measured in this paper. The dependences of orbital angular momentum on the parameters of the elliptical beams are investigated. The experimental results are consistent with the theoretical predictions.

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