Ultra-compact waveguide crossing for a mode-division multiplexing optical network
We propose and experimentally demonstrate an ultra-compact multimode waveguide
crossing that can process two modes simultaneously. The symmetric Y-junction is
introduced to split the high-order modes into fundamental ones, easing the subsequent
processing. The footprint of the proposed crossing is as compact as 21 μm× 21 μm. The
measured results show an insertion loss of∼ 1.82 dB for the TE_0 mode and∼ 0.46 dB for
the TE_1 mode at 1550 nm, as well as a crosstalk of<− 18 dB from 1510 to 1600 nm.
crossing that can process two modes simultaneously. The symmetric Y-junction is
introduced to split the high-order modes into fundamental ones, easing the subsequent
processing. The footprint of the proposed crossing is as compact as 21 μm× 21 μm. The
measured results show an insertion loss of∼ 1.82 dB for the TE_0 mode and∼ 0.46 dB for
the TE_1 mode at 1550 nm, as well as a crosstalk of<− 18 dB from 1510 to 1600 nm.
We propose and experimentally demonstrate an ultra-compact multimode waveguide crossing that can process two modes simultaneously. The symmetric Y-junction is introduced to split the high-order modes into fundamental ones, easing the subsequent processing. The footprint of the proposed crossing is as compact as 21 μm×21 μm. The measured results show an insertion loss of ∼1.82 dB for the TE_0 mode and ∼0.46 dB for the TE_1 mode at 1550 nm, as well as a crosstalk of <−18 dB from 1510 to 1600 nm.
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