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Compact Silicon-Arrayed Waveguide Gratings with Low Nonuniformity.

Chengkun Yang1, Zhonghao Zhou1, Xudong Gao1

  • 1Center for East China Research Institute of Electronics Engineering, Hefei 230036, China.

Sensors (Basel, Switzerland)
|August 29, 2024
PubMed
Summary
This summary is machine-generated.

Array waveguide gratings (AWGs) performance was optimized by altering output waveguide configurations. Converging output waveguides on the grating circle improved performance for microwave photonics (MWP) systems.

Keywords:
array waveguide gratingsintegrated photonic devicesmicrowave photonics

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Area of Science:

  • Integrated photonics
  • Microwave photonics (MWP)

Background:

  • Array waveguide gratings (AWGs) are crucial components in integrated photonic devices.
  • AWGs are widely utilized in microwave photonics (MWP) systems for multi-purpose and multi-functional applications.

Purpose of the Study:

  • To investigate the impact of different output waveguide configurations on AWG performance.
  • To optimize AWG design for enhanced performance in MWP systems.

Main Methods:

  • Comparative analysis of AWG designs with varying output waveguide configurations.
  • Fabrication of a 1x8 AWG with output waveguides converging onto the silicon-on-insulator (SOI) grating circle.
  • Experimental characterization of the fabricated AWG at a central wavelength of 1550 nm.

Main Results:

  • An AWG design with output waveguides converging on the grating circle demonstrated reduced crosstalk and improved uniformity.
  • The fabricated 1x8 AWG (500 μm × 450 μm) achieved an adjacent channel crosstalk of -12.68 dB.
  • Key performance metrics include a center channel insertion loss of 4.18 dB, 3 dB bandwidth of 1.22 nm, nonuniformity of 0.494 dB, and a free spectral range of 19.4 nm.

Conclusions:

  • The output waveguide configuration significantly influences AWG performance.
  • The proposed AWG design offers promising performance characteristics for future MWP systems.
  • The fabricated AWG exhibits good nonuniformity and insertion loss, making it suitable for MWP applications.