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6 February 2009 Bi-doped glasses for broadband fiber light source
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Bi-doped silica glass is a new broadband infrared fluorescence material. We drew optical fibers with the Bi doped silica glass for the fiber core and evaluated the fluorescence spectrum. The FWHM of fluorescence spectrum is measured to be 390 nm. When this broad band spectrum is used as an OCT light source, the expected axial resolution is calculated to be 1.9μm, This is comparable to the axial resolution (Δz~1μm) by Ti:Al2O3 system. And we also examined the local structure of Bi ion in Bi-doped silica glass. These are analyzed by ESR, EXAFS, XPS, and 27Al-NMR. According to these results, the structural model of Bi luminescent center is proposed that Bi5+ ion with 6-fold coordination exists close to Al3+ ion with 6-fold coordination.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yasushi Fujimoto "Bi-doped glasses for broadband fiber light source", Proc. SPIE 7212, Optical Components and Materials VI, 721202 (6 February 2009);

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