Abstract

Monolithically integrated polarization management is a key objective for the next generation of high speed optical coherent receivers, and will enable transmission rates up to 400 Gbps. In this work we present a polarization beam splitter (PBS) based on an asymmetrical Mach–Zehnder interferometer (MZI) monolithically integrated with a coherent receiver. Thermal tuning is incorporated on the MZI arms to partially compensate fabrication errors. We propose a complete model that predicts that thermal tuning can furthermore be used to adjust the wavelength response of the PBS. Measurements on a fully integrated receiver validate this model. We show full tunability of the PBS response within the C-band, with a polarization extinction ratio in excess of 16 dB for devices with an estimated width error up to 75 nm.

© 2013 IEEE

Integrated polarization beam splitter with relaxed fabrication tolerances

D. Pérez-Galacho, R. Halir, A. Ortega-Moñux, C. Alonso-Ramos, R. Zhang, P. Runge, K. Janiak, H.-G. Bach, A. G. Steffan, and Í. Molina-Fernández
Opt. Express 21(12) 14146-14151 (2013)

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High extinction ratio and an ultra-broadband polarization beam splitter in silicon integrated photonics by employing an all-dielectric metamaterial cladding

Andraž Debevc, Marko Topič, and Janez Krč
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