Link power budget advantage in GI-core polymer optical waveguide link for optical printed circuit boards

Sho Yakabe, Takaaki Ishigure, Shigeru Nakagawa

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

4 Citations (Scopus)

Abstract

For further advancement of next-generation high-performance computers, low-power consumption, high-density, and low-cost optical interconnection technologies should be adopted, and thus, optical printed circuit boards (O-PCBs) integrating polymer optical waveguides would be a key device. In particular, for low-power consumption, the link power budget should be low enough. In the optical link that consists of two waveguides on PCBs and a graded-index (GI) multimode fiber (MMF) connecting the two PCBs, such a low power budget is expected when GI-core waveguides are utilized. Essentially low coupling loss between the GI-core waveguide and a GI-MMF is one of the reasons of the low power budget, since the mode power profile mismatch between MMFs and GI-core waveguides is smaller than that between MMFs and SI-core waveguides. In this paper, we compose an optical link of vertical cavity surface emitting laser (VCSEL)-waveguide: SI or GI-MMF-waveguide: SI or GI-PD, and quantitatively evaluate the coupling loss at each connection point. When all the components are perfectly aligned, the total coupling loss is 1.9 dB in the link with GI-core waveguide. On the other hand, the SI-core waveguide link shows 0.8 dB higher coupling loss (2.72dB) than the GI-core waveguide link. When a misalignment of ±10 ìm is added at each connection and 50-ìm gaps are added at both VCSEL-waveguide and waveguide-PD connections, the GI-waveguide link demonstrate approximately 2-dB advantage in the power budget over the SI-waveguide link. Given limited power budget consideration for high bit rate optical links (∼25 Gb/s), GI-core waveguide enabling low link power budget would be a promising component for O-PCBs..

Original languageEnglish
Title of host publicationOptoelectronic Interconnects XII
DOIs
Publication statusPublished - 2012 Mar 26
EventOptoelectronic Interconnects XII - San Francisco, CA, United States
Duration: 2012 Jan 232012 Jan 25

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8267
ISSN (Print)0277-786X

Other

OtherOptoelectronic Interconnects XII
CountryUnited States
CitySan Francisco, CA
Period12/1/2312/1/25

Keywords

  • Optical interconnect
  • Polymer waveguides

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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  • Cite this

    Yakabe, S., Ishigure, T., & Nakagawa, S. (2012). Link power budget advantage in GI-core polymer optical waveguide link for optical printed circuit boards. In Optoelectronic Interconnects XII [82670J] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8267). https://doi.org/10.1117/12.907699