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Related Experiment Video

Updated: Jun 1, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
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Efficient broadband silicon-on-insulator grating coupler with low backreflection.

Neil Na1, Harel Frish, I-Wei Hsieh

  • 1Intel Corporation, 2200 Mission College Blvd, Santa Clara, California 95054, USA. yun-chung.n.na@intel.com

Optics Letters
|June 3, 2011
PubMed
Summary
This summary is machine-generated.

We developed an efficient broadband grating coupler on silicon-on-insulator, achieving 3 dB coupling loss to single-mode fiber at 1310 nm. This device offers a 58 nm spectral width and -27 dB backreflection for optical applications.

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Area of Science:

  • Photonics
  • Integrated Optics
  • Nanofabrication

Background:

  • Grating couplers are essential for interfacing integrated photonic circuits with optical fibers.
  • Efficient broadband coupling is crucial for high-performance optical communication systems.

Purpose of the Study:

  • To design and fabricate an efficient broadband grating coupler.
  • To characterize its performance, including coupling loss, spectral bandwidth, and backreflection.

Main Methods:

  • Fabrication of a grating coupler on a 400 nm thick silicon-on-insulator (SOI) wafer.
  • Experimental measurement of coupling efficiency to a single-mode fiber at 1310 nm wavelength.
  • Characterization of spectral full width at half maximum (FWHM) and backreflection.

Main Results:

  • Achieved a coupling loss of 3 dB to a single-mode fiber.
  • Measured a spectral full width at half maximum (FWHM) of 58 nm.
  • Determined a backreflection of -27 dB.

Conclusions:

  • The fabricated grating coupler demonstrates efficient broadband performance.
  • The results are promising for applications in optical interconnects and sensing.