Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7929454 | Optics Communications | 2015 | 7 Pages |
Abstract
A 90° hybrid based on InGaAsP/InP deep-ridge 4Ã4 Multi-Mode Interference (MMI) structure is designed. Three-dimensional beam propagation method (3-D BPM) is used in the simulation and error tolerance investigation process. The calculated common-mode rejection ratio (CMRR) and phase deviation are larger than 30 dB and smaller than 1.4° within 1530-1565 nm, respectively. Error tolerance of refractive index, thickness of core layer, waveguide width and length of MMI are analyzed. The designed hybrid is fabricated in the laboratory and measured in the coupling test platform. The test results show that CMRR of the hybrid is almost greater than 10 dB in the wavelength from 1530 to 1565 nm. The estimated phase deviation of the hybrid is less than 12° within 1533-1548 nm and even larger in other wavelengths. The performance degradation is explained well by the error-tolerance analysis.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Pan Pan, Junming An, Hongjie Wang, Yue Wang, Jiashun Zhang, Liangliang Wang, Qin Han, Xiongwei Hu,