Acta Optica Sinica, Volume. 35, Issue 7, 726001(2015)
Study on Properties of Speckle Field Formed by Laguerre-Gaussian Beam Illumination
The properties of speckle field is studied when Laguerre-Gaussian (LG) beams illuminate a ground glass plate. The LG vortex beams are generated by a spatial light modulator combing with computer-generated hologram. The relation of speckle size and azimuthal and radial indices and the bright region of the LG beams are analyzed experimentally. Experimental results show that the speckle size decreases linearly with the azimuthal index increasing for certain radial index. Similarly, the speckle size also decreases with the radial index increasing for certain azimuthal index. Moreover, the speckle size is proportional to the negative factor of illuminating area of the LG beam. Further, the negative factor is gradual close to the results of Gaussian beam illuminating with the increasing radial index.
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Li Xinzhong, Tian Xiaomin, Wang Hui, Tang Jie, Wang Yishan, Nie Zhaogang, Li Hehe, Wang Jingge. Study on Properties of Speckle Field Formed by Laguerre-Gaussian Beam Illumination[J]. Acta Optica Sinica, 2015, 35(7): 726001
Category: Physical Optics
Received: Mar. 2, 2015
Accepted: --
Published Online: Jun. 26, 2015
The Author Email: Xinzhong Li (xzli@haust.edu.cn)