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Power Flow in Multimode Graded-Index Microstructured Polymer Optical Fibers.

Svetislav Savović1,2, Ana Simović1, Branko Drljača3

  • 1Faculty of Science, University of Kragujevac, R. Domanovića 12, 34000 Kragujevac, Serbia.

Polymers
|March 29, 2023
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Summary

This study shows that microstructured polymer optical fibers reach equilibrium mode distribution faster than conventional ones. This faster convergence benefits optical communications and sensing applications.

Keywords:
graded-index optical fibermicrostructured optical fiberpolymer optical fiberpower flow equation

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Area of Science:

  • Optics
  • Materials Science
  • Telecommunications

Background:

  • Mode coupling is crucial for understanding signal propagation in multimode optical fibers.
  • Graded-index polymer optical fibers (GI POF) are used in various applications, but their performance can be limited by modal distribution.
  • Microstructured optical fibers offer unique properties for controlling light propagation.

Purpose of the Study:

  • To investigate mode coupling dynamics in a solid-core graded-index microstructured polymer optical fiber (GI mPOF).
  • To determine the lengths required for equilibrium mode distribution (EMD) and steady-state distribution (SSD).
  • To compare the mode coupling behavior of GI mPOF with conventional GI POF.

Main Methods:

  • Solving the time-independent power flow equation (TI PFE).
  • Utilizing launch beams with varied radial offsets to analyze modal power distribution transients.
  • Calculating the lengths L for EMD and z for SSD.

Main Results:

  • The GI mPOF achieves EMD at a significantly shorter length (L) compared to conventional GI POF.
  • This shorter L leads to an earlier transition to a slower bandwidth decrease phase.
  • The study quantifies the modal power distribution transients and SSD establishment.

Conclusions:

  • GI mPOF exhibits enhanced mode coupling characteristics, leading to faster EMD.
  • The findings suggest improved performance for GI mPOF in optical communications and sensing systems.
  • These results provide valuable data for the practical implementation of GI mPOF technology.