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16 October 1984 Fluoride Glass Infrared Fibers For Light Transmission Up To 5 μm
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Proceedings Volume 0484, Infrared Optical Materials and Fibers III; (1984)
Event: 1984 Technical Symposium East, 1984, Arlington, United States
Fluoride glass fibers of raising numerical aperture have been drawn from preforms. The increase in refractive index difference between core and cladding has been obtained by lowering the concentration of aluminium in the core. The evolution of the numerical aperture of these fibers has been measured with an apparatus specially constructed. The numerical aperture decreases slowly with increasing wavelength. In high numerical aperture fibers, N.A passes through a minimum at 2.9 μm which can be due to a difference in OH- absorption of core and cladding. Fibers with a low aluminium content in the core have lower losses at high wavelength than others, although their average level of losses-is higher.
© (1984) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gwenael Maze, Vincent Cardin, and Marcel Poulain "Fluoride Glass Infrared Fibers For Light Transmission Up To 5 μm", Proc. SPIE 0484, Infrared Optical Materials and Fibers III, (16 October 1984);


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