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Proceedings Paper

A compact SOI polarization beam splitter based on multimode interference coupler
Author(s): Z. Tu; Y. W. Huang; H. X. Yi; X. J. Wang; Y. P. Li; L. Li; W. W. Hu
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Paper Abstract

A multimode interference (MMI) polarization splitter with easy fabrication process was demonstrated in Silicon-On-Insulator substrate. The minimum device size, 8 μm×1034 μm was designed by Quasistate imaging effect theory. Numerical simulations show that this optimized MMI polarization splitter has a good fabrication tolerance. The tolerance of width and length is ±0.04 μm and ± 10 μm for transverse electric (TE) mode and ±0.14 μm and ±35 μm for transverse magnetic (TM) mode. The bandwidths are 20 nm and 80 nm for TE and TM respectively. Experiment results exhibits a -15 dB polarization extinction ratio bandwidth of 20 nm for the through-path and much wider for the crosspath. The extinction ratio and crosstalk achieve (-27.3 dB, -22.6 dB) for TE and (-26.6 dB, -23.9 dB) for TM.

Paper Details

Date Published: 29 November 2011
PDF: 6 pages
Proc. SPIE 8307, Passive Components and Fiber-Based Devices VIII, 830707 (29 November 2011); doi: 10.1117/12.905589
Show Author Affiliations
Z. Tu, Peking Univ. (China)
Y. W. Huang, Peking Univ. (China)
H. X. Yi, Peking Univ. (China)
X. J. Wang, Peking Univ. (China)
Y. P. Li, Peking Univ. (China)
L. Li, Peking Univ. (China)
W. W. Hu, Peking Univ. (China)

Published in SPIE Proceedings Vol. 8307:
Passive Components and Fiber-Based Devices VIII
Bishnu P. Pal, Editor(s)

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