High Performance Polarization Rotator-Splitter Based on Si3N4 Waveguide with Relaxed Fabrication Tolerance

Xiangyang Dai; Heng Li; Su Tan; Yongqian Tang; Qiaoyin Lu; John Donegan; Weihua Guo

European Conference on Optical Communication (ECOC) 2022
Technical Digest Series (Optica Publishing Group, 2022),
paper We5.13

High Performance Polarization Rotator-Splitter Based on Si₃N₄ Waveguide with Relaxed Fabrication Tolerance

Xiangyang Dai, Heng Li, Su Tan, Yongqian Tang, Qiaoyin Lu, John Donegan, and Weihua Guo

European Conference and Exhibition on Optical Communication 2022

Basel Switzerland
18–22 September 2022
ISBN: 978-1-957171-15-9

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Joint Poster Session II (We5)

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X. Dai, H. Li, S. Tan, Y. Tang, Q. Lu, J. Donegan, and W. Guo, "High Performance Polarization Rotator-Splitter Based on Si3N4 Waveguide with Relaxed Fabrication Tolerance," in European Conference on Optical Communication (ECOC) 2022, J. Leuthold, C. Harder, B. Offrein, and H. Limberger, eds., Technical Digest Series (Optica Publishing Group, 2022), paper We5.13.

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Abstract

A novel polarization rotator-splitter is presented based on Si₃N₄ platform with relaxed fabrication-tolerance and high-performance. The proposed device is fabricated by standard- photolithography due to the introduced high-asymmetrical directional-coupler, and demonstrates a polarization extinction-ratio ~20dB with the fabrication-tolerance ~±150nm and polarization conversion-loss ~1.5dB across the C-band.

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