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Mechanically-Induced Long-Period Fiber Gratings Using Laminated Plates.

Ismael Torres-Gómez1, Daniel E Ceballos-Herrera2, Karla M Salas-Alcantara1

  • 1Centro de Investigaciones en Óptica AC, Loma del Bosque 115, León Gto. 37150, Mexico.

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Summary
This summary is machine-generated.

A novel method uses laminated plates to create mechanically-induced long-period fiber gratings (MI-LPFGs). This technique reduces fabrication pressure and enables low duty cycles, paving the way for new optical communication systems.

Keywords:
coarse wavelength division multiplexingleading rejection bandmechanically-induced long-period fiber gratings

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Area of Science:

  • Photonics and Optical Engineering
  • Materials Science
  • Fiber Optic Sensors

Background:

  • Long-period fiber gratings (LPFGs) are crucial optical components.
  • Traditional fabrication methods for mechanically-induced LPFGs (MI-LPFGs) often require high pressures and result in higher duty cycles.
  • Developing new, efficient, and low-pressure fabrication techniques for MI-LPFGs is essential for advancing optical sensing and communication.

Purpose of the Study:

  • To introduce a novel formation method for mechanically-induced long-period fiber gratings (MI-LPFGs) utilizing laminated plates.
  • To experimentally characterize the properties of MI-LPFGs fabricated with this new method.
  • To explore the potential applications of these MI-LPFGs in optical communication systems.

Main Methods:

  • A new laminated plate, composed of parallel-assembled single-edged utility blades with varying trapezoidal edge polishing, was designed.
  • Optical fibers were compressed between a flat plate and the proposed laminated plate to temporarily inscribe MI-LPFGs.
  • Experimental characterization of the fabricated MI-LPFGs was performed in the 1100-1700 nm spectral range.

Main Results:

  • MI-LPFGs were successfully fabricated with a period of 480 ± 20 µm and low duty cycles (around 10%).
  • The gratings exhibited a dominant rejection band (>15 dB) and several shallow bands (<2 dB).
  • The new method significantly reduced the required mechanical pressure, minimizing optical fiber failure risk.

Conclusions:

  • The proposed laminated plate method offers a superior approach for fabricating MI-LPFGs with controlled low duty cycles.
  • These MI-LPFGs demonstrate promising spectral characteristics suitable for optical applications.
  • The ability to create MI-LPFGs with a single rejection band opens possibilities for coarse wavelength division multiplexing systems.