Nano/Sub-Nanometer Bandpass Optical Filtering in Prism Pair Loaded Planar Optical Waveguide

Nano/Sub-Nanometer Bandpass Optical Filtering in Prism Pair Loaded Planar Optical Waveguide
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棱镜对加载平面光波导中的纳米/亚纳米带通光学滤波

DOI:
10.1109/lpt.2016.2615301
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发表时间:
2016-10
影响因子:
2.6
通讯作者:
Tao Li
Tao Li
中科院分区:
工程技术3区
文献类型:
--
作者:
Liu Jianhua;Tao Li

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采用严格的耦合波分析方法对棱镜对加载平面光波导(POW)中的两步导模谐振进行了理论分析。所提出的结构配置由具有两个包层棱镜的多层POW组成。推导了两个棱镜的反射率和透射率的解析表达式。结果表明,在谐振角处,所提出的具有单模/多模光波导层的结构可以实现中心波长处具有纳米/亚纳米带宽的100%透射率的对称通带。这种类型的窄带通滤波器可应用于光通信、激光系统、光谱学和各种类型的传感。
Two-step guided mode resonance in prism pair loaded planar optical waveguide (POW) is theoretically analyzed with the rigorous coupled wave analysis method. The proposed structural configuration is composed of a multi-layered POW with two cladding prisms. Analytical expressions for reflectance and transmittance in the two prisms are derived. It is shown that at the resonant angle, symmetric passband of 100% transmittance with nano/sub-nanometer bandwidth at the central wavelength can be realized in the proposed structure with single/ multi-mode(s) optical waveguide layers. This type of narrow bandpass filter may find applications in optical communications, laser systems, spectroscopies, and various types of sensing.
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