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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Frequency dependence of the optical force between two coupled waveguides.

Lin Zhu1

  • 1Department of Electrical and Computer Engineering, Center for Optical Materials Science and Engineering Technologies, Clemson University, Clemson, South Carolina 29634, USA. zhu3@clemson.edu

Optics Letters
|September 17, 2009
PubMed
Summary

The optical force between coupled waveguides depends on individual waveguide dispersion. Supermode theory accurately predicts this frequency dependence, confirmed by numerical calculations.

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Area of Science:

  • Photonics
  • Optical physics
  • Waveguide optics

Background:

  • Coupled waveguide systems are fundamental in integrated photonics.
  • Understanding optical forces is crucial for designing optical devices and manipulating light.
  • The frequency dependence of optical forces in such systems requires detailed theoretical and numerical investigation.

Purpose of the Study:

  • To investigate the frequency dependence of optical forces in coupled waveguide systems.
  • To establish the relationship between optical force and waveguide dispersion relations.
  • To validate theoretical predictions with numerical simulations.

Main Methods:

  • Utilizing supermode theory to analyze the optical force.
  • Deriving the frequency dependence from the dispersion relations of uncoupled waveguides.
  • Performing numerical calculations for representative coupled waveguide systems at various frequencies.

Main Results:

  • Demonstrated that the frequency dependence of optical force is governed by individual waveguide dispersion.
  • Numerical results for three distinct coupled systems align well with supermode analysis predictions.
  • Confirmed the validity of supermode theory in predicting optical forces across different frequencies.

Conclusions:

  • Supermode theory provides an accurate framework for understanding the frequency-dependent optical force in coupled waveguides.
  • Individual waveguide dispersion relations are the key determinants of optical force behavior.
  • The findings offer insights for the design and optimization of photonic integrated circuits.