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Proceedings Paper

Vertical coupling and polarization-independent subwavelength grating beam splitter based on silicon-on-insulator
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Paper Abstract

We describe a novel beam splitter with advantages of a single-layer, compact and vertical coupling structure, which is based on Bragg diffraction conditions and phase match equation. FDTD method is used to optimize the design of beam splitter. The result of simulation shows that both polarizations incident light are separated into two beams of nearly equal power (near 43% split and 45% split, respectively), which are coupled into opposite directions in the waveguide. For TE mode, the coupling efficiency of the right direction and the left direction are 42.54% and 43.68, respectively. That of TM mode is 46.03% and 44.07%, respectively. The power difference for two polarizations of two output port is less than 1% and 2%, in addition, 40nm and 65nm bandwidth is achieved.

Paper Details

Date Published: 5 November 2015
PDF: 7 pages
Proc. SPIE 9795, Selected Papers of the Photoelectronic Technology Committee Conferences held June–July 2015, 979531 (5 November 2015); doi: 10.1117/12.2209534
Show Author Affiliations
Jingjing Zhang, National Univ. of Defense Technology (China)
Junbo Yang, National Univ. of Defense Technology (China)
Peking Univ. (China)
Huanyu Lu, Univ. of Electronic Science and Technology of China (China)
National Univ. of Defense Technology (China)
Wenjun Wu, National Univ. of Defense Technology (China)
Jie Huang, National Univ. of Defense Technology (China)
Shengli Chang, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 9795:
Selected Papers of the Photoelectronic Technology Committee Conferences held June–July 2015
Shenggang Liu; Songlin Zhuang; Michael I. Petelin; Libin Xiang, Editor(s)

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