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

ZiQing Lu; Han Ye; Shuai Wang; Feng Xiao; LiYan Geng; Qin Han

doi:10.1117/12.2549883

20 December 2019 Design and simulation of a polarization insensitive optical 90° hybrid based on InP multimode interference coupler

ZiQing Lu, Han Ye, Shuai Wang, Feng Xiao, LiYan Geng, Qin Han

Author Affiliations +

Proceedings Volume 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019); 112094K (2019) https://doi.org/10.1117/12.2549883
Event: Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 2019, Xi'an, China

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).

Citation Download Citation

ZiQing Lu, Han Ye, Shuai Wang, Feng Xiao, LiYan Geng, and Qin Han "Design and simulation of a polarization insensitive optical 90° hybrid based on InP multimode interference coupler", Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 112094K (20 December 2019); https://doi.org/10.1117/12.2549883

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