Chinese Optics Letters, Vol. 12, Issue 5, 050701 (2014)
Tunable rectangular array illuminator in periodically poled LiNbO3 crystal
Qiuying Li, Juan Huo, Xiaohui Zhao, and Xianfeng Chen
An electro-optic tunable rectangular array illuminator in one-dimensional periodically poled LiNbO3 (PPLN) crystal is presented experimentally which result is in good agreement with results from simulation. The illuminator is formed based on the Talbot self-imaging effect by applying an electric field on PPLN. The intensity distribution of rectangular array could be precisely modulated. Compared with other array illuminators, this tunable illuminator uses a lower voltage and could get a more concentrated intensity distribution. The influence of the incident angle to the self-imaging patterns is studied for the first time.