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Related Experiment Video

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Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
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Published on: September 25, 2020

Silicon mode multi/demultiplexer based on multimode grating-assisted couplers.

Huiye Qiu1, Hui Yu, Ting Hu

  • 1Department of Information Science and Electronics Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, Zhejiang Province 310027, China.

Optics Express
|August 14, 2013
PubMed
Summary
This summary is machine-generated.

A novel silicon mode (de)multiplexer using grating-assisted couplers offers low crosstalk and flexible mode control. This device achieves low insertion loss, enabling efficient optical signal routing for advanced photonic integrated circuits.

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Area of Science:

  • Photonics and Optical Engineering
  • Integrated Optics
  • Silicon Photonics

Background:

  • Mode (de)multiplexers are crucial components in optical communication systems for wavelength and mode routing.
  • Existing devices often face challenges with crosstalk, insertion loss, and fabrication complexity.
  • Silicon photonics offers a scalable platform for integrated optical devices.

Purpose of the Study:

  • To propose and analyze a simple, low-crosstalk 1x4 silicon mode (de)multiplexer.
  • To demonstrate flexible control over mode transitions using grating design.
  • To achieve efficient optical signal routing with minimal signal degradation.

Main Methods:

  • Design of a mode (de)multiplexer utilizing multimode grating-assisted couplers.
  • Utilizing phase-matching conditions to control mode transitions by adjusting grating periods.
  • Leveraging contra-directional coupling to relax requirements on coupling strength and length control.

Main Results:

  • The proposed device exhibits low crosstalk between optical channels.
  • Achieved insertion losses of 0.2 dB, 0.34 dB, and 0.21 dB for different mode channels.
  • Demonstrated 3 dB bandwidths of 3.7 nm, 7.6 nm, and 11.8 nm for the 1st, 2nd, and 3rd modes, respectively.

Conclusions:

  • The developed silicon mode (de)multiplexer is a simple and effective solution for optical signal routing.
  • The grating-assisted coupler design allows for precise and flexible mode control.
  • The device's performance metrics indicate its suitability for integrated photonic applications.