Highly Integrated Optical 4$\,\times\,$4 Crossbar in Silicon-on-Insulator Technology

Abstract

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> In this paper, we present the design, fabrication, and characterization of a highly integrated optical 4<formula formulatype="inline"><tex Notation="TeX">$\,\times\,$</tex> </formula>4 crossbar based on microring resonator add-drop filters. The designed crossbar structure, as small as <formula formulatype="inline"><tex Notation="TeX">$50\,\mu{\hbox {m}}\times50\,\mu{\hbox {m}}$</tex></formula>, has been fabricated in CMOS compatible silicon on insulator technology. Finally, experimental results proving the proper operation of the fabricated crossbar structures are discussed. </para>