Analysis of the polarization rotation effect in the inversely tapered spot size converter

Analysis of the polarization rotation effect in the inversely tapered spot size converter
Title:
Analysis of the polarization rotation effect in the inversely tapered spot size converter
Other Titles:
Optics Express
Keywords:
Publication Date:
14 October 2015
Citation:
Lianxi Jia, Haifeng Zhou, Tsung-Yang Liow, Junfeng Song, Ying Huang, Xiaoguang Tu, Xianshu Luo, Chao Li, Qing Fang, Mingbin Yu, and Guoqiang Lo, "Analysis of the polarization rotation effect in the inversely tapered spot size converter," Opt. Express 23, 27776-27785 (2015)
Abstract:
Inversely tapered spot size converter (SSC) is widely used to connect silicon waveguide with fiber in silicon photonics. However, the tapered structure may cause polarization rotation and further generate interference fluctuation in the transmission spectrum even of a straight waveguide. We analyzed the light propagation in a straight waveguide with SSC at the both ends with coupling matrix and transmission matrix methods. The analysis results matched with the phenomena we observed in the transmission spectrum. Combining the analysis with the measurement results, we calculated the polarization rotation efficiency of the SSC in different samples and analyzed the origin of the polarization rotation effect. Finally, we discussed the influence of the effect to the DP-QPSK signal and proposed several methods to release the impact.
License type:
PublisherCopyrights
Funding Info:
Description:
ISSN:
1094-4087
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