Laser & Optoelectronics Progress, Volume. 48, Issue 9, 90501(2011)
Intensity Distribution and Spiral Spectra of Laguerre-Gaussian Beam Passing through a Single-Slit
Based on the Fresnel diffraction integral, the diffraction pattern of a Laguerre-Gaussian beam passing through a single-slit has been studied. It is found that the diffraction fringes of the Laguerre-Gaussian beam will dislocate and bend which have also been demonstrated by experiments. The spiral spectra of the Laguerre-Gaussian beam passing through the single-slit are also investigated. It is shown that the spiral spectra will broaden with the existence of the single-slit. In addition, the phase distribution of the Laguerre-Gaussian beam in the diffraction plane has also been investigated. The research results can be used to measure the topological charges of vortex beams.
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Gao Fuhai, Chen Baosuan, Pu Jixiong, Zhu Jianqiang. Intensity Distribution and Spiral Spectra of Laguerre-Gaussian Beam Passing through a Single-Slit[J]. Laser & Optoelectronics Progress, 2011, 48(9): 90501
Category: Diffraction and Gratings
Received: Mar. 24, 2011
Accepted: --
Published Online: Jul. 25, 2011
The Author Email: Fuhai Gao (gfhai@siom.ac.cn)