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Polarization manipulation on step-index composite polymer beam splitters for photonics circuitry.

Noor Afsary1, Fariha Tasnim1, Md Omar Faruk Rasel1

  • 1Physics Discipline, Khulna University, Khulna, 9208, Bangladesh.

Heliyon
|February 6, 2024
PubMed
Summary

Researchers developed polymer composite beam splitters for photonic integrated circuits, achieving 99% efficiency and a 50:50 split ratio. Optimized designs minimize excess loss and crosstalk for polarized light applications.

Keywords:
Alternating direction implicit (ADI) methodComposite couplerPolarization manipulationPolymer optical waveguidesStep-index core

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Area of Science:

  • Optoelectronics
  • Materials Science
  • Photonics

Background:

  • Photonic integrated circuits (PICs) require efficient and reliable optical components.
  • Polymer materials offer advantages for fabricating complex PIC structures.
  • Beam splitters are fundamental components in PICs for signal manipulation.

Purpose of the Study:

  • To design and analyze composite beam splitters using polymer materials for PICs.
  • To achieve high output efficiency and a precise splitting ratio.
  • To investigate and minimize polarization dependency and excess loss.

Main Methods:

  • Utilized organic-inorganic hybrid polymer materials for composite beam splitters.
  • Employed step-index (SI) core profiles.
  • Designed and analyzed using the alternating direction implicit technique in Rsoft CAD BeamPROP solver.

Main Results:

  • Achieved 99% output efficiency with a 50:50 splitting ratio.
  • Demonstrated low excess loss of 0.014 dB for unpolarized light.
  • Minimized excess loss to 0.05 dB and crosstalk to -19.77 dB at a 31-degree incident angle for polarized light.

Conclusions:

  • Composite beam splitters fabricated with polymer materials are suitable for PICs.
  • The design allows for efficient light splitting with manageable polarization effects.
  • Further optimization of incident angles can significantly reduce losses and crosstalk.