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\begin{document}

\title{Advanced optical filters with coupled Sagnac loop waveguide reflectors}



\author[1]{David Moss }%
\affil[1]{Swinburne University of Technology}%


\vspace{-1em}



  
  \date{June 16, 2024}


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\begin{abstract}
We present theoretical designs of high performance optical filters in
integrated silicon photonic nanowire resonators. We use mode
interference in formed by zig-zag waveguide coupled Sagnac loop
reflectors (ZWC-SLRs), tailored to achieve diverse filtering functions
with good performance. These include compact bandpass filters with
improved roll-off, optical analogues of Fano resonances with ultrahigh
spectral extinction ratios (ERs) and slope rates, and resonance mode
splitting with high ERs and low free spectral ranges. The analysis
verifies the feasibility of multi-functional integrated photonic filters
based on ZWC-SLR resonators for flexible spectral engineering in diverse
applications.%
\end{abstract}%



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