Journal
OPTICS EXPRESS
Volume 25, Issue 7, Pages 8296-8305Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.25.008296
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- Natural Sciences and Engineering Research Council of Canada (NSERC)
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We have experimentally demonstrated a compact polarization beam splitter (PBS) based on the silicon nitride/silicon-on-insulator platform using the recently proposed augmented-low-index-guiding (ALIG) waveguide structure. The two orthogonal polarizations are split in an asymmetric multimode interference (MMI) section, which was 1.6 mu m wide and 4.8 mu m long. The device works well over the entire C-band wavelength range and has a measured low insertion loss of less than 1 dB. The polarization extinction ratio at the Bar Port is approximately 17 dB and at the Cross Port is approximately 25 dB. The design of the device is robust and has a good fabrication tolerance. (C) 2017 Optical Society of America
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