Chen Jian-Hua, Huang Yang-Tung, Yang Yu-Lin, Lu Ming-Feng, Shieh Jia-Min
Department of Electronics Engineering and Institute of Electronics, National Chiao Tung University, Hsinchu 30010, Taiwan.
Appl Opt. 2012 Aug 20;51(24):5876-84. doi: 10.1364/AO.51.005876.
Silicon-based (Si-based) photonic crystal waveguide based on antiresonant reflecting optical waveguide (ARROW PCW) structures consisting of 60° bends and Y-branch power splitters were designed and first efficiently fabricated and characterized. The ARROW structure has a relatively large core size suitable for efficient coupling with a single-mode fiber. Simple capsule-shaped topography defects at 60° photonic crystal (PC) bend corners and Y-branch PC power splitters were used for increasing the broadband light transmission. In the preliminary measurements, the propagation losses of the ARROW PC straight waveguides lower than 2 dB/mm with a long length of 1500 μm were achieved. The average bend loss of 60° PC bend waveguides was lower than 3 dB/bend. For the Y-branch PC power splitters, the average power imbalance was lower than 0.6 dB. The results show that our fabricated Si-based ARROW PCWs with 60° bends and Y-branch structures can provide good light transmission and power-splitting ability.
设计并首次高效制造和表征了基于反谐振反射光波导（ARROW）结构的硅基光子晶体波导，该结构由60°弯曲和Y分支功率分配器组成。ARROW结构具有相对较大的纤芯尺寸，适合与单模光纤进行高效耦合。在60°光子晶体（PC）弯曲角和Y分支PC功率分配器处采用简单的胶囊形拓扑缺陷来增加宽带光传输。在初步测量中，实现了长度为1500μm的ARROW PC直波导的传播损耗低于2dB/mm。60°PC弯曲波导的平均弯曲损耗低于3dB/弯曲。对于Y分支PC功率分配器，平均功率不平衡低于0.6dB。结果表明，我们制造的具有60°弯曲和Y分支结构的硅基ARROW PCW能够提供良好的光传输和功率分配能力。
