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Optical Engineering • Open Access

Grating lobes analysis based on blazed grating theory for liquid crystal optical-phased array
Author(s): Jian Chen; Guolong Cui; Lingjiang Kong; Feng Xiao; Xin Liu; Xiaoguang Zhang

Paper Abstract

The grating lobes of the liquid crystal optical-phased array (LCOPA) based on blazed grating theory is studied. Using the Fraunhofer propagation principle, the analytical expressions of the far-field intensity distribution are derived. Subsequently, we can obtain both the locations and the intensities of the grating lobes. The derived analytical functions that provide an insight into single-slit diffraction and multislit interference effect on the grating lobes are discussed. Utilizing the conventional microwave-phased array technique, the intensities of the grating lobes and the main lobe are almost the same. Different from this, the derived analytical functions demonstrate that the intensities of the grating lobes are less than that of the main lobe. The computer simulations and experiments show that the proposed method can correctly estimate the locations and the intensities of the grating lobes for a LCOPA simultaneously.

Paper Details

Date Published: 10 September 2013
PDF: 10 pages
Opt. Eng. 52(9) 097102 doi: 10.1117/1.OE.52.9.097102
Published in: Optical Engineering Volume 52, Issue 9
Show Author Affiliations
Jian Chen, Univ. of Electronic Science and Technology of China (China)
Guolong Cui, Univ. of Electronic Science and Technology of China (China)
Lingjiang Kong, Univ. of Electronic Science and Technology of China (China)
Feng Xiao, Univ. of Electronic Science and Technology of China (China)
Xin Liu, Electro-Optical Information Security Cotnrol Lab. (China)
Xiaoguang Zhang, Electro-Optical Information Security Control Lab. (China)


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