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Fast modal decomposition for optical fibers using digital holography.
Meng Lyu1,2, Zhiquan Lin1,2, Guowei Li1,2
1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China.
Scientific Reports
|July 28, 2017
Summary
We developed a fast digital holography technique for optical fiber modal decomposition. This method accurately and cost-effectively analyzes light propagation in step-index fibers.
Area of Science:
- Optics and Photonics
- Electromagnetics
- Fiber Optics
Background:
- Eigenmode decomposition offers insights into light propagation in optical fibers.
- Understanding modal behavior is crucial for fiber optic communication and sensing.
- Existing methods may lack speed, completeness, or cost-effectiveness.
Purpose of the Study:
- To present a fast and complete modal decomposition technique for step-index optical fibers.
- To enable accurate characterization of the light field at the fiber output.
- To provide a cost-effective solution for modal analysis.
Main Methods:
- Utilizing digital holography to capture the light field at the fiber output.
- Leveraging the orthonormal property of basis modes for modal decomposition.
- Calculating modal coefficients for each mode present in the fiber.
Main Results:
- Demonstrated a fast and complete eigenmode decomposition technique.
- Achieved accurate calculation of modal coefficients.
- Validated the technique through optical experiments.
Conclusions:
- The proposed digital holography technique is a fast, accurate, and cost-effective method for modal decomposition in step-index optical fibers.
- This approach enhances the understanding of electromagnetic-wave propagation in optical fibers.
- The technique has practical implications for fiber optic system characterization and development.
