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An MMI-Based 4-Beam Combiner with Spline-Curved Index Step

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Abstract

We propose a compact MMI-based 4-beam combiner with a spline-curved index step. The 1.74 mm-long device designed in InP material systems offers 3 dB better transmittance than power combiners at a 4.5 nm wavelength spacing.

© 2015 Optical Society of America

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