High-bandwidth and low-loss photonic crystal power-splitter with parallel output based on the integration of Y-junction and waveguide bends |
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| Authors: | Daquan Yang Huiping Tian Yuefeng Ji |
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| Affiliation: | 1. College of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, Jiangsu, China;2. State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian 710119, Shanxi, China;1. Instituto de Óptica Daza de Valdés, Consejo Superior de Investigaciones Científicas (CSIC), Madrid 28006, Spain;2. Alcyon Photonics S.L., Madrid 28004, Spain;3. Universidad de Málaga, Departamento de Ingeniería de Comunicaciones, ETSI Telecomunicación, 29071 Málaga, Spain;4. Bionand Center for Nanomedicine and Biotechnology, Parque Tecnológico de Andalucía, Málaga 29590, Spain;5. National Research Council Canada, 1200 Montreal Road, Bldg. M50, Ottawa K1A 0R6, Canada;1. State Key Laboratory of Synthetical Automation for Process Industries, College of Information Science and Engineering, Northeastern University, Shenyang 110819, China;2. Institute of Engineering and Technology, Tie Ling Normal College, Tieling 112000, China |
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| Abstract: | A 1×2 power-splitter with parallel output that exhibits high-bandwidth and low-loss splitting for TE-polarized light is designed based on a photonic crystal slab in a silicon-on-insulator (SOI) material. The high performance is achieved by the integration of a Y-junction and 60° waveguide bends, which is designed to ensure single-mode operation, and keep the output channels of the power-splitter be parallel to the input channel. With a three-dimensional finite-difference time-domain (3D-FDTD) technique, ultralow-loss output of the optimized power-splitter with normalized transmission above 45% (in the range 3.216±0.18 dB) is obtained in the high-bandwidth range 1472–1634 nm, which covers the entire C-band of optical communication. In addition, the simulation results demonstrate that when the manufacture error of the lattice shift (dx) is in the range of ±10 nm, the disturbance of the transmission and the bandwidth are 1.52% and 6.79%, respectively. Both the specific result and the general idea of integration design are promising in the optical integrated circuit (OIC) and integrated optical devices in the future. |
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