Analysis and Simulation of an Optical Coupler Based on a Single Mode Fiber and a Crystal Photonic Fiber

Document Type : Original Article

Authors

1 Master's degree, Shahid Rajaee Teacher Training University, Tehran, Iran

2 Associate Professor, Shahid Rajaee Teacher Training University, Tehran, Iran

Abstract

A new evanescent-field-based coupler that achieves high coupling efficiency between a single-mode fiber (SMF) and a photonic crystal fiber (PCF) is proposed. Firstly, an introduction of photonic crystal fibers has been discussed. Also, some characteristics of PCF would be proposed. The coupling equations are presented and a numerical solution is obtained in this letter. Optimization of the refractive index, the effective radius of PCF, and the coupling length can enhance the coupling efficiency. It is shown that a maximum coupling ratio of 92% can be achieved for a coupling length of 600μm for commercially available SMFs and PCFs. The proposed PCF-SMF fiber coupler opens a path for the development of unique modalities for fiber-optic chemical sensors where the light ingress and egress paths can be via SMF, but the light interaction with analytes of interest occurs in the PCF where enhanced evanescent interactions can be obtained at the multiple air holes.

Keywords

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References

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Applied Electromagnetics
Volume 12, Issue 1 - Serial Number 28
Spring and Summer
September 2024
Pages 1-12

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History

  • Receive Date: 14 March 2024
  • Revise Date: 07 June 2024
  • Accept Date: 28 June 2024
  • Publish Date: 24 July 2024

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