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Embedded optical micro/nano-fibers for stable devices.

Na Lou1, Rajan Jha, Jorge Luis Domínguez-Juárez

  • 1ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860, Castelldefels (Barcelona), Spain.

Optics Letters
|February 18, 2010
PubMed
Summary

Embedding silica micro/nano-fibers in Teflon protects them from optical degradation. This technique enhances the durability and stability of optical fiber devices.

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Optical micro/nano-fibers are crucial for various photonic devices.
  • Bare silica fibers are susceptible to optical degradation, limiting their application.
  • Protecting these fibers is essential for device longevity.

Purpose of the Study:

  • To develop a cost-effective method for embedding silica micro/nano-fibers.
  • To investigate the impact of embedding on the optical properties and stability of silica fibers.
  • To assess the potential for preserving evanescent waves in embedded fibers.

Main Methods:

  • Spin coating technique for embedding silica micro/nano-fibers in Teflon.
  • Optical characterization of bare, partially embedded, and fully embedded fibers.
  • Analysis of optical degradation based on fiber diameter and embedding configuration.

Main Results:

  • Embedding silica fibers in Teflon prevents optical degradation, especially for fibers smaller than twice the wavelength of guided light.
  • Completely embedded fibers exhibit long-term stability.
  • Partially embedded fibers maintain significant evanescent wave coupling with minimal degradation, further improvable with functional overlayers.

Conclusions:

  • The developed spin coating technique offers a simple and inexpensive fabrication method for durable optical fiber devices.
  • Embedding is a viable strategy to enhance the stability of silica micro/nano-fibers.
  • This advancement paves the way for robust and stable photonic devices utilizing optical micro/nano-fibers.