Metamaterial-based low-pass spatial filters for high-power lasers

Yuanjiang Xiang; Wenhua Su; Xiaoyu Dai; Zhixiang Tang; Shuangchun Wen; Dianyuan Fan

doi:10.1117/12.755124

6 February 2008 Metamaterial-based low-pass spatial filters for high-power lasers

Yuanjiang Xiang, Wenhua Su, Xiaoyu Dai, Zhixiang Tang, Shuangchun Wen, Dianyuan Fan

Proceedings Volume 6823, High-Power Lasers and Applications IV; 68230K (2008) https://doi.org/10.1117/12.755124
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

Two kinds of novel spatial filters constructed by metamaterials and their possible applications in high-power laser systems have been investigated. The first one can be constructed by forming a compensating bilayer of indefinite metamaterials. It is shown that the cutoff wave vector of the low-pass spatial filter can be adjusted desirably. The second kind of low-pass spatial filter is based on the controllable dispersion characteristics of photonic crystals. With proper design, the higher spatial frequency components, which are incident to the filter with angles exceed a critical value, are reflected totally because no Bloch waves of the photonic crystals can be excited. However, the lower spatial frequency components are coupled to the self-collimating modes and permeate with high transmission. The applications of the two novel kinds of metamaterials-based low-pass spatial filter in high-power lasers are discussed.

Citation Download Citation

Yuanjiang Xiang, Wenhua Su, Xiaoyu Dai, Zhixiang Tang, Shuangchun Wen, and Dianyuan Fan "Metamaterial-based low-pass spatial filters for high-power lasers", Proc. SPIE 6823, High-Power Lasers and Applications IV, 68230K (6 February 2008); https://doi.org/10.1117/12.755124

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