研究目的
Investigating the fabrication of quartz optical fibers with increased fluorine content for use in fluorimeter probes to enhance the sensitivity of fluorescence diagnostics of tumors in the near-IR spectral range.
研究成果
The developed SiO2/SiO2–F quartz OFs with an increased content of fluorine in the cladding (up to 7 wt %) and low optical loss can enhance the sensitivity of fluorimeters working in the near-IR spectral range. A prototype of a 19-fiber high-aperture probe for a high-sensitivity fiberoptic fluorimeter was successfully developed.
研究不足
The study focuses on the fabrication and initial testing of quartz optical fibers with increased fluorine content. The practical application and long-term stability of these fibers in clinical settings require further investigation.
1：Experimental Design and Method Selection:
The study employed a laboratory technology for fabricating OF preforms using microwave plasma-chemical deposition at low pressure. The method involved doping quartz glass with fluorine to form fluorosilicate cladding.
2：Sample Selection and Data Sources:
Quartz preforms of OFs were fabricated using deposition of the SiO2 layers doped with fluorine on the inner surface of supporting quartz tubes.
3：List of Experimental Equipment and Materials:
A microwave device working at the H10 wave served as a plasmatron. Freon-218 (C3F8) was used as the fluorine-containing agent. The core was made of Heraeus superdry quartz glass.
4：Experimental Procedures and Operational Workflow:
The preform was formed by placing a rod made of Heraeus quartz glass inside a quartz tube with the SiO2–F layer, then collapsing the structure using an oxyhydrogen torch. The OFs were drawn with the aid of a drawing machine with simultaneous deposition of a P-12E thermoplastic protecting jacket.
5：Data Analysis Methods:
The radial profile of the fluorine concentration was obtained using a GETAC JSM.U3 raster electron microscope equipped with an energy-dispersive X-ray spectrometer and digital scanning.
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