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On-Chip E00-E20 Mode Converter Based on Multi-Mode Interferometer.

Yuan Zhang1, Yuexin Yin2, Yingzhi Ding2

  • 1School of Physics, Changchun University of Science and Technology, Changchun 130022, China.

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|May 27, 2023
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Summary
This summary is machine-generated.

This study introduces a novel MMI-based mode converter for mode-division multiplexing (MDM) systems. The device demonstrates high conversion efficiency and fabrication tolerance, promising for optical networks.

Keywords:
integrated opticintegrated optics devicesmode convertermultimode interference

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Area of Science:

  • Photonics and Optical Engineering
  • Integrated Optics
  • Waveguide Technology

Background:

  • Mode converters are crucial for mode-division multiplexing (MDM) systems, enabling advanced signal processing and multi-mode conversion.
  • Existing mode converters often face challenges with fabrication tolerance and bandwidth limitations.
  • Silica PLC (Planar Lightwave Circuit) platforms offer a robust base for integrated photonic devices.

Purpose of the Study:

  • To propose and experimentally validate a novel MMI-based mode converter.
  • To achieve efficient conversion from the E00 mode to the E20 mode.
  • To demonstrate high fabrication tolerance and broad bandwidth for practical applications.

Main Methods:

  • Design and fabrication of a MMI-based mode converter on a 2%-Δ silica PLC platform.
  • Experimental characterization of conversion efficiency across a wavelength range (1500-1600 nm).
  • Assessment of conversion efficiency degradation under variations in multimode waveguide length and phase shifter width.

Main Results:

  • The MMI-based mode converter successfully transfers the E00 mode to the E20 mode.
  • Conversion efficiency exceeds -1.741 dB over a 1500 nm to 1600 nm wavelength range.
  • Measured conversion efficiency reaches -0.614 dB at 1550 nm, with efficiency degradation less than 0.713 dB under fabrication variations.

Conclusions:

  • The proposed MMI-based mode converter exhibits excellent performance, including high conversion efficiency and broad bandwidth.
  • The device demonstrates significant fabrication tolerance, making it suitable for mass production.
  • This technology holds promise for advancing on-chip optical networks and commercial photonic applications.