多光纤点光源干涉法制作光子晶体的研究

Fabrication of photonic crystals by using multi-fiber interferometry

利用多光纤点光源全息干涉法对四光纤(4+1)和五光纤(5+1)的干涉场进行理论模拟和实验测量,并比较了中心光束对整个干涉场的影响,研究表明中心光束只对干涉场对比度有影响,而不影响干涉晶格结构。同时给出了多光纤干涉的实验结果,从实验结果看出,实验和理论有比较好的一致性。并且设计了四根光纤干涉形成的渐变型光子晶体结构,对其光场的分束和聚焦作用进行了理论模拟。本文的研究为制作渐变型光子晶体分束器和聚焦透镜提供了很好的理论和实验依据。

In this article,theoretical calculation and experimental measurement of four and five fiber interfering field are investigated by using multi-fiber holographic interferometry. The effect of the central beam on the interfering field is explored, and the results show that the central beam only affects the interfering contrast without affecting the lattice structure. At the same time,by comparing the theoretical and experimental results, a good agreement is obtained. Fur-thermore,gradient photonic crystal （GPC） structures are designed for four fiber interferometry. The beam splitting and focusing effect is analyzed for GPC structures. This provides theoretical and experimental basis for the fabrication of good beam splitter and a focusing lens.