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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Single-mode-fiber refractive-index profile measurement by reflection method.

|February 23, 2010

Summary

This summary is machine-generated.

A novel reflection-based method accurately measures the refractive index profile of single-mode fibers. This technique overcomes limitations of spot size, achieving high spatial and refractive-index resolution for fiber optics analysis.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Accurate measurement of refractive index profiles is crucial for single-mode fiber characterization.
Traditional reflection methods face challenges with small core fibers relative to laser spot size.

Purpose of the Study:

To introduce and validate a new reflection-based technique for measuring the refractive index profile of single-mode fibers.
To demonstrate the method's capability in overcoming limitations of existing techniques.

Main Methods:

Development of a novel reflection-based measurement technique.
Utilizing beam spot size and reflected power distribution for index profile calculation.
Experimental validation using practical single-mode fibers.

Main Results:

The new technique accurately determines the true refractive index profile, even when the core radius is comparable to the laser spot size.
Achieved a spatial resolution of 0.3 micrometers.
Obtained a relative refractive-index resolution of 5%.

Conclusions:

The developed reflection method provides a highly accurate and reliable way to measure refractive index profiles in single-mode fibers.
This technique offers significant improvements in resolution for practical fiber optic applications.