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Design guidelines for collimating or focusing graded-index fiber tips
Optics Express
|October 7, 2021
Summary
This study numerically analyzes graded-index fiber tips for UV to short-infrared wavelengths. It provides design guidelines for focusing or collimating fiber tips, enhancing photonics applications beyond optical coherence tomography.
Area of Science:
- Photonics and Optical Engineering
- Fiber Optics Technology
- Numerical Modeling
Background:
- Graded-index fiber tips are crucial for optical coherence tomography (OCT) in vivo bioimaging.
- Their application in other photonics fields is limited despite their potential.
- Existing research lacks comprehensive numerical studies across a wide spectral range.
Purpose of the Study:
- To conduct the first numerical investigation of graded-index fiber tips.
- To analyze performance across UV to short-infrared wavelengths.
- To provide design guidelines for fabricating focusing or collimating fiber tips.
Main Methods:
- Numerical simulation of graded-index fiber tip performance.
- Analysis of wavelength dependency.
- Evaluation of probe geometry influence on optical characteristics.
Main Results:
- Detailed analysis of far-field divergence angle, spot size, and working distance.
- Identification of wavelength-dependent performance variations.
- Demonstration of geometry's impact on fiber tip characteristics.
Conclusions:
- Graded-index fiber tips offer versatile performance across a broad spectrum.
- Accessible design guidelines facilitate fabrication for diverse photonics applications.
- Fiber collimators and focusing tips have significant potential in free-space systems and high-resolution imaging.
