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Related Experiment Videos

Nanotaper for compact mode conversion.

Vilson R Almeida1, Roberto R Panepucci, Michal Lipson

  • 1School of Electrical and Computer Engineering, Cornell University, 411 Phillips Hall, Ithaca, New York 14853, USA. vra2@cornell.edu

Optics Letters
|August 9, 2003
PubMed
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We developed a compact nanotaper coupler for efficient mode conversion between optical fibers and submicrometer waveguides. This silicon-on-insulator device enhances coupling efficiency by 10x, enabling miniaturized photonic circuits.

Area of Science:

  • Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Efficient mode conversion is crucial for integrating optical fibers with compact photonic circuits.
  • Existing couplers often face limitations in efficiency and size.

Purpose of the Study:

  • To propose and demonstrate an efficient coupler for compact mode conversion between optical fibers and submicrometer waveguides.
  • To achieve significant enhancement in coupling efficiency using a novel design.

Main Methods:

  • Fabrication of a silicon-on-insulator (SOI) based nanotaper coupler.
  • Utilizing high-index-contrast materials for the coupler design.
  • Characterization of mode field profile and effective index conversion.

Main Results:

Related Experiment Videos

  • Demonstration of a micrometer-long nanotaper coupler (40 microm).
  • Efficient conversion of both mode field profile and effective index.
  • Measured enhancement of coupling efficiency by 1 order of magnitude (10x).

Conclusions:

  • The proposed nanotaper coupler enables highly efficient and compact mode conversion.
  • This technology is suitable for miniaturized photonic integrated circuits.
  • Significant improvement in fiber-to-waveguide coupling efficiency is achieved.