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Micro Light Flow Controller on a Programmable Waveguide Engine.

Tao Chen1,2, Zhangqi Dang1,2, Zeyu Deng2

  • 1College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.

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Summary
This summary is machine-generated.

A novel light flow controller uses microheaters on a multimode waveguide to precisely manage optical power distribution. This compact device offers real-time, arbitrary power routing to three ports, advancing optical communication and computing applications.

Keywords:
arbitrary power splitteroptimized algorithmprogrammable photonic integrated circuitsthermo-optic effects

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Area of Science:

  • Photonics
  • Integrated Optics
  • Waveguide Engineering

Background:

  • Conventional optical power control often relies on single-mode waveguides, which can be bulky and require numerous electrodes.
  • Tuning optical properties in multimode waveguides is complex due to intricate mode interactions and lack of analytical solutions.
  • Existing numerical simulations for device response are computationally intensive and time-consuming.

Purpose of the Study:

  • To develop a compact and efficient light flow controller for regulating three-port optical power.
  • To demonstrate real-time, arbitrary power routing in both lossless and lossy conditions using a programmable multimode waveguide.
  • To overcome the limitations of conventional methods and time-consuming simulations in optical device control.

Main Methods:

  • Realization of a light flow controller on a programmable multimode waveguide engine.
  • Utilizing microheaters on the waveguide chip to create tunable "pixels" for local refractive index adjustment.
  • Development of a multi-level search program based on experimental data for real-time iterative control of microheaters.

Main Results:

  • Achieved precise regulation of three-port optical power in both lossless and lossy modes.
  • Demonstrated arbitrary power ratio routing to any of the three output ports using a simple structure with four microheaters.
  • The developed search program effectively adjusts microheaters in real-time, overcoming local optima for global improvement.

Conclusions:

  • The proposed multimode waveguide approach offers a more compact and electrode-efficient solution for optical power control compared to single-mode methods.
  • The experimental, real-time multi-level search program enables efficient and flexible control of light flow in integrated photonic devices.
  • This work paves the way for novel, compact, and efficient photonic integrated devices for optical communication and computing.