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Related Experiment Videos

Bragg fiber design for linear polarization.

G Ronald Hadley1, James G Fleming, Shawn-Yu Lin

  • 1Sandia National Laboratories, Albuquerque, New Mexico 87185-5800, USA. grhadle@sandia.gov

Optics Letters
|May 4, 2004
PubMed
Summary
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This study introduces a novel Bragg fiber design for low-loss propagation of linearly polarized light. Experimental results demonstrate losses under 6 dB/cm over a 60-nm range, outperforming conventional designs.

Area of Science:

  • Photonics
  • Optical Fibers
  • Materials Science

Background:

  • Conventional Bragg fibers exhibit high losses for linearly polarized light.
  • Existing quarter-wave designs are optimized for TE01 modes, not linear polarization.

Purpose of the Study:

  • To present a new Bragg fiber design enabling low-loss propagation of linearly polarized light.
  • To investigate the impact of layer thickness on optical losses in Bragg fibers.

Main Methods:

  • Utilizing a simple ray model for theoretical predictions.
  • Fabricating Bragg fibers using a Silicon/Silicon Dioxide (Si/SiO2) system.
  • Experimentally verifying light propagation losses and spectral range.

Main Results:

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  • Doubling the first wall layer thickness significantly reduces TM-like boundary losses.
  • TE-like boundary losses are maintained at manageable levels.
  • Achieved losses below 6 dB/cm over a 60-nm spectral range for linearly polarized light.

Conclusions:

  • The new Bragg fiber design effectively supports low-loss propagation of linearly polarized light.
  • This design offers a significant improvement over traditional quarter-wave designs for specific polarization states.
  • Experimental validation confirms the theoretical predictions and practical applicability of the novel design.