Polarization-independent two-dimensional beam steering using liquid crystal optical phased arrays

Liang Wu; Xiangru Wang; Caidong Xiong; Ziqiang Huang; Rusheng Zhuo; Jiarui Rao; Qinggui Tan

doi:10.3788/COL201715.101601

Chinese Optics Letters, Volume. 15, Issue 10, 101601(2017)

Polarization-independent two-dimensional beam steering using liquid crystal optical phased arrays

Liang Wu^1,2, Xiangru Wang^2、*, Caidong Xiong¹, Ziqiang Huang³, Rusheng Zhuo², Jiarui Rao², and Qinggui Tan⁴

Author Affiliations

¹School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China

²School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China

³Research Institute of Electronic Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, China

⁴National Key Laboratory of Science and Technology on Space Microwave, Xi’an 710100, China

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Fig. 1. (Color online) Schematic diagram of the polarization-independent 2D beam steering setup, where the 1D LC-OPAs are used.

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Fig. 2. (Color online) (a) Experimental setup of the polarization-independent 2D beam steering. (b) Measured phase retardation versus driving voltage.

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Fig. 3. (Color online) Measured output steering angles in $x$ (azimuth) and $y$ (elevation) direction versus different polarization angles of the linearly polarized beam. Inserted figures are the captured beam patterns of several polarization states under the steering angle of $(θ_{x}, θ_{y}) = (1000, 1000) μ rad$ .

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Fig. 4. Beam patterns of output beams and corresponding polarization components at three different polarization angles. Polarization angles of the linearly polarized incident beam are: (a) 0°, (b) 45°, and (c) 90°. The steering angle is (700, 800) μrad.

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Table 1. Diffraction Efficiency of the LC-OPA
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Table 1. Diffraction Efficiency of the LC-OPA
3.050° 1.524° 0.762° 0.381° 0.190°
Before optimization 20.6% 38.2% 47.7% 50.2% 56.4%
After optimization 65.2% 72.0% 78.6% 81.8% 84.7%

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Liang Wu, Xiangru Wang, Caidong Xiong, Ziqiang Huang, Rusheng Zhuo, Jiarui Rao, Qinggui Tan, "Polarization-independent two-dimensional beam steering using liquid crystal optical phased arrays," Chin. Opt. Lett. 15, 101601 (2017)

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