Silicon photonic broadband polarization-insensitive switch based on polarization-mode diversity conversion

Author:

Li Weijia1ORCID,Xu Luhua2,Wei Zixian1ORCID,Zhang Jinsong1ORCID,Mao Deng1ORCID,D’Mello Yannick1ORCID,Plant David V.1

Affiliation:

1. McGill University

2. CMC Microsystems

Abstract

We present a 2 × 2 polarization-insensitive switch on a 220-nm silicon-on-insulator platform, employing a balanced Mach–Zehnder interferometer (MZI) structure. This design incorporates polarization-insensitive adiabatic couplers, polarization rotators based on mode hybridization and evolution, and thermo-optic mode-insensitive phase shifters with wide waveguides. The switch exhibits broadband polarization-insensitive characteristics, with extinction ratios larger than 15 dB, insertion losses less than 2.3 dB, and polarization-dependent losses less than 1 dB for wavelengths ranging from 1500 nm to 1600 nm. The power consumption required for simultaneously switching the fundamental transverse electric (TE0) and transverse magnetic (TM0) polarized modes is 29.1 mW. These results highlight the potential of the switch as a building block for on-chip polarization-division-multiplexed optical interconnects.

Funder

Fonds de recherche du Québec – Nature et technologies

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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