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Engineering of fast mode conversion in multimode waveguides.

Shuo-Yen Tseng1, Xi Chen

  • 1Department of Photonics, National Cheng Kung University, Tainan 701, Taiwan. tsengsy@mail.ncku.edu.tw

Optics Letters
|December 22, 2012
PubMed
Summary
This summary is machine-generated.

We developed a new method for fast and robust mode conversion in multimode waveguides using Lewis-Riesenfeld invariant theory. This approach significantly reduces the length of mode converters compared to traditional methods.

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Area of Science:

  • Optics and Photonics
  • Quantum Information Science
  • Waveguide Technology

Background:

  • Mode conversion in multimode waveguides is crucial for various photonic applications.
  • Existing methods often face limitations in speed, robustness, or device length.
  • Controlling light propagation in complex waveguide structures remains a challenge.

Purpose of the Study:

  • To propose and demonstrate a novel, fast, and robust mode conversion technique in multimode waveguides.
  • To leverage Lewis-Riesenfeld invariant theory for designing efficient mode converters.
  • To reduce the physical length of mode converters while maintaining high conversion efficiency.

Main Methods:

  • Utilizing Lewis-Riesenfeld invariant theory to design dynamical invariants for mode conversion.
  • Employing computer-generated planar holograms to shape optical pulses.
  • Mimicking shaped pulses to drive transitions in three-level quantum systems.
  • Implementing an invariant-based inverse engineering scheme for device design.

Main Results:

  • Demonstrated fast and robust mode conversion in multimode waveguides.
  • Successfully designed mode converters using the multimode driving for dynamical invariant.
  • Showcased the reduction in mode converter length compared to adiabatic schemes.
  • Validated the effectiveness of invariant-based inverse engineering.

Conclusions:

  • The proposed invariant-based inverse engineering scheme offers a significant advancement in multimode waveguide mode conversion.
  • This method provides a pathway to shorter, more efficient, and robust photonic devices.
  • The technique has potential applications in optical communications, sensing, and quantum technologies.