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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Evanescent field coupling between two parallel close contact SMS fiber structures.

Qiang Wu1, Youqiao Ma, Jinhui Yuan

  • 1Photonics Research Centre, School of Electronic and Communications Engineering, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland. qiang.wu@dit.ie

Optics Express
|February 15, 2012
PubMed
Summary
This summary is machine-generated.

We developed a new optical coupling method using parallel singlemode-multimode-singlemode (SMS) fiber structures to efficiently couple light between optical fibers. This technique achieved a high extinction ratio and significant coupling efficiency.

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Area of Science:

  • Optics and Photonics
  • Fiber Optics Communications

Background:

  • Optical fiber sensors and devices often require efficient light coupling.
  • Existing coupling techniques can be complex or limited in efficiency.

Purpose of the Study:

  • To propose and demonstrate a novel, efficient optical coupling technique.
  • To utilize singlemode-multimode-singlemode (SMS) fiber structures for enhanced light coupling.

Main Methods:

  • Developed a coupling technique using two parallel SMS fiber structures in close contact.
  • The first SMS structure excites cladding modes, which are then coupled to the second SMS structure.
  • Theoretical analysis and experimental validation of the proposed technique.

Main Results:

  • Achieved a pass band spectral response.
  • Demonstrated an extinction ratio exceeding 20 dB.
  • Obtained a maximum coupling efficiency of 5.9%.

Conclusions:

  • The proposed parallel SMS fiber structure offers an effective method for optical coupling.
  • This technique shows potential for applications in optical sensing and communication systems.