The grating lobes of the liquid crystal optical-phased array (LCOPA)<br />based on blazed grating theory is studied. Using the Fraunhofer<br />propagation principle, the analytical expressions of the far-field<br />intensity distribution are derived. Subsequently, we can obtain both the<br />locations and the intensities of the grating lobes. The derived<br />analytical functions that provide an insight into single-slit<br />diffraction and multislit interference effect on the grating lobes are<br />discussed. Utilizing the conventional microwave-phased array technique,<br />the intensities of the grating lobes and the main lobe are almost the<br />same. Different from this, the derived analytical functions demonstrate<br />that the intensities of the grating lobes are less than that of the main<br />lobe. The computer simulations and experiments show that the proposed<br />method can correctly estimate the locations and the intensities of the<br />grating lobes for a LCOPA simultaneously. (C) The Authors. Published by<br />SPIE under a Creative Commons Attribution 3.0 Unported License.<br />Distribution or reproduction of this work in whole or in part requires<br />full attribution of the original publication, including its DOI.
Chen, J., Cui, G., Kong, L., Xiao, F., Liu, X., & Zhang, X. (2013). Grating lobes analysis based on blazed grating theory for liquid crystal optical-phased array. Optical Engineering, 52(9), 097102. https://doi.org/10.1117/1.oe.52.9.097102