Dual beam formation and 2-D scan technique of liquid crystal optical phased array
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1.
Research Institute of Electronic Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, China;
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2.
Academy of Space Information System, Xi'an 710000, China;
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3.
School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China;
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4.
School of Optoelectronic information, University of Electronic Science and Technology of China, Chengdu 610054, China
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Received Date:
2012-11-09
Accepted Date:
2012-11-28
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Abstract
In order to realize dual beam formation and 2-D scan in optical phased array, choosing glass as substrate material and liquid crystal as phase-shifting medium, using the electric control phase-shifting characteristics of liquid crystal, double beam formation and phase control spatial scanning of incident light were gotten. Wave control data were transmitted to LCD driver chip by FPGA chip and the liquid crystal phase shifting array was driven by voltage, and beam scanning function was controlled, so a single transmissive-type liquid crystal optical phased-control array assembly was developed. Therefore, based on beam scanning function of the assembly, a liquid crystal optical phased array was developed by cascading multiple-assembly to realize dual beam formation and 2-D scan. The results show that the cascading system has the ability to achieve double beam independent deflection control and high precision 2-D deflection.
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