STEP AND GRADED-INDEX CORE-BASED POLYMER MULTIMODE INTERFERENCE SPLITTERS FOR PHOTONIC INTEGRATED CIRCUITS

• DOI: 10.1364/opticaopen.22492756.v1
• Publication Date: 2023-04-03T09:49:30Z
• Authors: MD Omar Faruk Rasel; Noor Afsary; Md Koushik Alam; Fariha Tasnim; Md Nazmuz Sakib; Ryosuke Hatai; Takaaki Ishigure
• Keywords: Splitter; Beam propagation method; Beam splitter; Waveguide

This paper demonstrates step-index (SI) and graded-index (GI) core-based multimode interference (MMI) splitters realized with polymer materials for photonic integrated circuits (PICs). These SI GI index-based MMI guide the input light through waveguide following self-imaging principles demonstrate multiple outputs same uniformity when length is obtained. We numerically design develop (1×5) by using beam propagation method (BPM), we use RSoft CAD BeamPROP solver structural characterization. The structures of are optimized investigating parameters, particularly width core spacing between output ports maximum uniform intensity at length. also compare optical properties waveguides. excess losses splitter 1.09 1.12 dB transverse electric (TE) magnetic (TM) modes, respectively, while splitter, 0.56 0.55 TE TM respectively 1.55 µm. power splitting efficiency 77%, splitters, it 88%. investigate polarization dependence loss (PDL) both 0.024 0.005 dB, respectively.