Inter-channel crosstalk analysis for W-shaped and graded-index core polymer optical waveguides with ray tracing method

Hsiang Han Hsu, Keishiro Shitanda, Takaaki Ishigure

Research output: Chapter in Book/Report/Conference proceedingConference contribution


For high-density and high-speed optical interconnections using parallel polymer optical waveguides (PPOW), we theoretically and experimentally demonstrate that W-shaped refractive index profiles in the cores are capable of decreasing the inter-channel crosstalk compared to step-index (SI) and even to graded index (GI) waveguides. In this paper, first we analyze the optical characteristics of polymer waveguides with different index profiles by means of the ray tracing model with scattering effect previously we developed. The calculation results confirm the index valley surrounding each core works properly for preventing the power coupling from the cladding modes to the propagation modes. Next, we show the fabrication process (preform method) for such a waveguide, where the cladding material is composed of a copolymer of methyl methacrylate (MMA) and benzyl methacrylate (BzMA). Compared to a GI-core PPOW we previously fabricated with the same core material, the 1-m long PPOW with W-shaped refractive index profile exhibits not only a low propagation loss (0.027 dB/cm), but an even lower inter-channel crosstalk value (-32 dB).

Original languageEnglish
Title of host publicationOptoelectronic Interconnects and Component Integration XI
Publication statusPublished - 2011 Apr 11
EventOptoelectronic Interconnects and Component Integration XI - San Francisco, CA, United States
Duration: 2011 Jan 242011 Jan 26

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherOptoelectronic Interconnects and Component Integration XI
Country/TerritoryUnited States
CitySan Francisco, CA


  • Graded-index core
  • Inter-channel crosstalk
  • Polymer parallel optical waveguide
  • Ray tracing
  • W-shaped index profile

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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