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Highly fabrication tolerant polarization converter for generic photonic integration technology

In this work, we report on experimental results of a fully integrated polarization converter made in InP. The device relies on slanted side wall waveguides. Using a novel design, we are able to demonstrate 15 dB of polarization extinction ratio (PER) for a fabrication tolerance of > 250 nm with respect to the critical waveguide width. The design of the device was derived using a new fully analytical model. No active tuning is required.