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Structural microfiber long-period gratings.

Li-Peng Sun1, Jie Li, Long Jin

  • 1Institute of Photonics Technology, Jinan University, Guangzhou 510632, China.

Optics Express
|October 6, 2012
PubMed
Summary
This summary is machine-generated.

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Researchers created a novel microfiber long-period grating by coiling fibers. This compact device exhibits a strong transmission notch and tunable spectral response, offering flexibility for new optical functions.

Area of Science:

  • Optical Engineering
  • Materials Science

Background:

  • Long-period gratings (LPGs) are crucial optical components.
  • Existing LPG fabrication methods can be complex and limit device miniaturization.

Purpose of the Study:

  • To demonstrate a novel, compact microfiber-based long-period grating.
  • To investigate the optical properties and potential applications of this new structure.

Main Methods:

  • Experimentally fabricating a long-period grating by helically coiling one microfiber onto a thicker, straight microfiber.
  • Analyzing the transmission spectrum and its response to external strain.

Main Results:

  • Achieved a resonance transmission notch of ~16.2 dB within a compact device length of ~450 μm (4 helical periods).

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  • Demonstrated the ability for filtered light energy to emerge from the coiled fiber, enabling new device functionalities.
  • Observed a wide spectral response to external strain, with a tuning range of approximately 106 nm.

    • Conclusions:

    • The novel coiled microfiber structure offers a compact and effective method for creating long-period gratings.
    • This technique provides flexibility for developing advanced optical devices with tunable spectral characteristics.