一种具有滤波功能的V形双支路出射光集束设计

A design of V-shaped dual-branch beaming of light emitting with filtering function

摘要:

目前现有的光子晶体器件对于出射光集束和滤波集成方面研究较少，且对于出射光集束和滤波方面的集成性能存在不足，为了实现光子晶体滤波和出射光集束可靠且高效结合，本文提出了一种具有滤波功能的V形二维正方光子晶体波导出射光集束结构，该结构含有三个出射端口，由一条干路和两条支路构成，通过干路和支路之间的干涉，增强了集束的性能，使有效传播距离得到了提高。在出射端口前含有四个滤波微腔结构，对1.452μm，1.493μm，1.562μm和1.664μm四个中心波长进行滤除，滤波效率分别为99.8%，97.4%，97.5%和99.1%。通过对集束设计结构的测试，该结构对非中心波长滤波波段具有极强的集束能力。经过测试发现，在1.310μm和1.340μm时，有效传播距离分别达到了397.7μm和445.9μm。

Abstract:

At present, there is less research on the integration of output light beam focusing and filtering in the existing photonic crystal devices, and there are deficiencies in the integration performance of output light beam focusing and filtering. In order to realize the reliable and efficient combination of photonic crystal filtering and output light beam focusing. In this paper,a V-shaped two-dimensional square photonic crystal waveguide beam-forming structure with light-emitting and filtering functions is proposed. The structure contains three outgoing ports, which are composed of one trunk and two branches. Through the interference between the trunk and the branch, the performance of beam-forming is enhanced, and the effective propagation distance is improved. The four filtering micro-cavity structures in front of the exit port are used to filter out four central wavelengths, namely 1.452μm, 1.493μm, 1.562μm and 1.664μm, with the filtering efficiencies of 99.8%, 97.4%, 97.5% and 99.1% respectively.Through tests on the proposed structure, the structure shows a strong ability to filter the non-central wavelength bands. After testing, it is found that the effective propagation distance reaches 397.7μm and 445.9μm at 1.310μm and 1.340μm, respectively.