Arbitrary multiple beam forming by two cascaded liquid crystal optical phased arrays | Zendy

Liang Wu | Zendy; Xiangru Wang | Zendy; Xiaoxian He | Zendy; Ziqiang Huang | Zendy; Xinning Huang | Zendy; Cai-Dong Xiong | Zendy

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Arbitrary multiple beam forming by two cascaded liquid crystal optical phased arrays

Author(s) -

Liang Wu,

Xiangru Wang,

Xiaoxian He,

Ziqiang Huang,

Xinning Huang,

Cai-Dong Xiong

Publication year - 2018

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.26.017066

Subject(s) - optics , wavefront , phased array optics , beam steering , beam (structure) , diffraction , amplitude , phase (matter) , phase modulation , laser , phased array , laser beam quality , materials science , physics , laser beams , computer science , phase noise , telecommunications , quantum mechanics , antenna (radio)

A new method for non-mechanical laser beam splitting and steering is demonstrated. Two cascaded liquid crystal optical phased arrays (LC-OPAs) controllably modulate the amplitude and phase of an incident laser beam to realize the near-field wavefronts of multiple simultaneous beams with arbitrary directions. Diffraction between the two arrays is avoided by precise 4-f imaging from one LC-OPA to the other (array resolution 1×1920). In the method of cascaded amplitude and phase (CAP) devices, numerical simulation results show the characteristics of amplitude and phase modulation profiles, as well as the far-field intensity patterns. Both the numerical and experimental results clearly demonstrate the capabilities of fast multi-beam forming with high efficiency (>85%, 4 beams) and accuracy (deviation <90μrad).

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