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Related Experiment Video

Updated: Jun 14, 2026

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
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Bridging the gap between nanophotonic waveguide circuits and single mode optical fibers using diffractive grating

G Roelkens1, D Vermeulen, F Van Laere

  • 1Photonics Research Group, Ghent University/IMEC, Sint-Pietersnieuwstraat 41, B-9000 Ghent, Belgium.

Journal of Nanoscience and Nanotechnology
|April 2, 2010
PubMed
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Diffractive grating structures enable efficient fiber-to-chip coupling for photonic integrated circuits. These structures offer broadband, high-efficiency, and polarization-independent performance, reducing testing costs.

Area of Science:

  • Photonics
  • Optoelectronics
  • Integrated Optics

Background:

  • High index contrast (HIC) photonic integrated circuits (PICs) face challenges in efficient optical fiber interfacing.
  • Traditional fiber-to-chip coupling often requires precise alignment and polished facets, increasing manufacturing costs.
  • Polarization dependence in HIC PICs complicates device performance and testing.

Purpose of the Study:

  • To demonstrate the efficacy of diffractive grating structures for interfacing optical fibers with HIC waveguide circuits.
  • To develop grating couplers that enable broadband, high-efficiency, and polarization-independent coupling.
  • To introduce an optical probe for component-level testing of PICs.

Main Methods:

  • Design and simulation of diffractive grating structures for fiber-to-chip coupling.

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Last Updated: Jun 14, 2026

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
13:02

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Published on: February 25, 2017

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08:48

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

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12:18

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Published on: August 5, 2013

  • Fabrication of grating couplers on HIC PICs.
  • Characterization of coupling efficiency, bandwidth, and polarization dependence.
  • Development and testing of an optical probe for PIC component analysis.

    • Main Results:

    • High index contrast grating structures achieve broadband and high-efficiency optical coupling.
    • Grating couplers eliminate the need for polished facets, enabling wafer-scale testing and cost reduction.
    • Two-dimensional grating structures effectively mitigate polarization dependence in HIC PICs.
    • A novel optical probe facilitates individual component testing on PICs.

    Conclusions:

    • Diffractive grating structures provide an efficient and cost-effective solution for fiber-to-chip interfacing in PICs.
    • Wafer-scale testing enabled by grating couplers significantly reduces the cost of integrated optical circuits.
    • The developed optical probe offers a valuable tool for characterizing individual components within PICs.