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Design and simulation of a polarization insensitive optical 90° hybrid based on InP multimode interference coupler
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Paper Abstract

We propose a polarization insensitive multimode interference coupler (MMI) design for optical 90° hybrid. The 90° hybrid used in coherent receiver application is based on the Indium Phosphorus (InP) platform, which can realize monolithic integration with detectors. By using the three dimension beam propagation method, a 90° hybrid based on a polarization insensitive MMI has been designed and optimized. We find that there is an ideal interference length for both transverse electric (TE) mode and transverse magnetic (TM) mode in this structure. Using the designed 90° hybrid, we demonstrate the common mode rejection ratios for in-phase channels and quadrature channels better than -20 dB and the phase errors better than ±3° in an ideal interference length range. The phase errors of the I-channel and Q-channel less than ±4° when the interference length is 480μm across the C band (1535-1560 nm).

Paper Details

Date Published: 20 December 2019
PDF: 7 pages
Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 112094K (20 December 2019); doi: 10.1117/12.2549883
Show Author Affiliations
ZiQing Lu, Institute of Semiconductors, Chinese Academy of Sciences (China)
Univ. of Chinese Academy of Sciences (China)
Han Ye, Institute of Semiconductors, Chinese Academy of Sciences (China)
Univ. of Chinese Academy of Sciences (China)
Shuai Wang, Institute of Semiconductors, Chinese Academy of Sciences (China)
Univ. of Chinese Academy of Sciences (China)
Feng Xiao, Institute of Semiconductors, Chinese Academy of Sciences (China)
Univ. of Chinese Academy of Sciences (China)
LiYan Geng, Institute of Semiconductors, Chinese Academy of Sciences (China)
Univ. of Chinese Academy of Sciences (China)
Qin Han, Institute of Semiconductors, Chinese Academy of Sciences (China)
Univ. of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 11209:
Eleventh International Conference on Information Optics and Photonics (CIOP 2019)
Hannan Wang, Editor(s)

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