2-DIMENSIONAL OPTICAL ARCHITECTURE FOR TIME-DELAY BEAM FORMING IN A PHASED-ARRAY ANTENNA

被引：67
|
作者：
DOLFI, D
MICHELGABRIEL, F
BANN, S
HUIGNARD, JP
机构：
[1] Thomson-CSF, Laboratoire Central de Recherches, Orsay Cedex, 91404, Domaine de Corbeville
来源：
OPTICS LETTERS | 1991年 / 16卷 / 04期
关键词：
D O I：
10.1364/OL.16.000255
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose and experimentally demonstrate a new two-dimensional optical architecture based on polarization switching by N spatial light modulators that provides 2N time delays to a phased-array antenna of p X p radiating elements. Moreover the 0 to 2-pi-phase of the microwave signals is optically controlled by a liquid-crystal spatial light modulator that operates in the birefringent mode. The microwave signal originates from the coherent detection of a dual-frequency laser beam obtained with an acousto-optic frequency shifter. Preliminary experimental results obtained at a microwave frequency f = 1.85 GHz are presented.
引用
收藏
页码：255 / 257
页数：3
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