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Compact and wideband optical 90o hybrid based on a one- way tapered MMI coupler
Compact wideband optical 90o hybrid based apered MMI coupler
2015/5/21
We report compact and wideband 90o hybrid with a one-way tapered 4×4 MMI waveguide. The fabricated device with a device length of 198 μm exhibited a phase deviation of <±5.4o over a 70-nm-wide spectra...