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Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light

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Three-dimensional characterization of the light distribution from diffusing cylindrical optical-fiber tips.

R L Kozodoy, S L Lundahl, D Bell

|October 14, 2010

Summary

A new method quantitatively measures light distribution from optical-fiber diffusers for photodynamic therapy. Microbending and laser choice significantly impact diffuser uniformity, crucial for effective treatment.

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Area of Science:

Biomedical Optics
Photodynamic Therapy Delivery Systems

Background:

Accurate light delivery is critical for effective photodynamic therapy (PDT).
Optical-fiber diffusers are commonly used for light delivery in PDT.
Understanding light distribution from diffusers is essential for optimizing treatment efficacy.

Purpose of the Study:

To develop a rapid and sensitive technique for quantitatively examining 3D light distribution from optical-fiber diffusers.
To evaluate the uniformity of light output from cylindrical diffusing tips.
To establish a standard detector configuration for assessing diffuser optical quality.

Main Methods:

Development of a novel system for quantitative 3D light distribution analysis.
Evaluation of longitudinal and azimuthal uniformity of light output from cylindrical diffusers.
Investigation of microbending and laser choice effects on light intensity distribution.

Main Results:

A sensitive and accurate method for analyzing diffuser light output was established.
Fiber microbending was found to significantly impact the uniformity of light distribution.
The choice of laser significantly affected the output intensity distribution and uniformity.

Conclusions:

The developed technique provides a reliable method for characterizing optical-fiber diffusers for PDT.
Fiber optic integrity and laser selection are critical factors influencing PDT light delivery uniformity.
This system aids in optimizing diffuser design and selection for improved PDT outcomes.