300 nm bandwidth adiabatic SOI polarization splitter-rotators exploiting continuous symmetry breaking

• DOI: 10.1364/oe.23.019261
• Publication Date: 2015-07-16T18:38:29Z
• Authors: Luciano Socci; Vito Sorianello; Marco Romagnoli
• Keywords: Splitter; Coupled mode theory

Adiabatic polarization splitter-rotators are investigated exploiting continuous symmetry breaking thereby achieving significant device size and losses reduction in a single mask fabrication process for both SOI channel ridge waveguides. A crosstalk lower than -25 dB is expected over 300nm bandwidth, making the suitable full grid CWDM diplexer/triplexer FTTH applications at 1310, 1490 1550nm.