7 March 2014 Fabrication of microstructured fibers from preforms with sealed top-end holes
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Abstract
Theoretical aspects of microstructured fibers fabrication from preforms with sealed holes at the top end are discussed. Dependences of the holes blowing degree on their diameters, on a ratio of the preform top end temperature to temperature in the center of a furnace and on other parameters are estimated. Experimental results of different microstructured fibers drawing in such a regime are presented. We have drawn the simplest microstructured fiber with one hole from a tube with outside diameter 6.2 mm and inner diameter 4.4 mm (capillary drawing). Also we have drawn MSFs from preforms with 6 and 60 small holes. To check the results of the theoretical analysis we have prepared a preform with different size holes and then drew it into a fiber. In all cases experimental results are in good agreement with theoretical estimations. Thus this method of fabrication gives the possibility to manufacture long length microstructured fibers with stable internal structural parameters, high reproducibility, ease of controlling and changing the fibers parameters and opportunity to make structures with holes of different sizes. The observed changes of the holes blowing degree in our experimental samples can be easily compensated with the help of additional heating of the preform top end. Besides, such heating makes it possible to control and change the holes blowing degree, particularly during the fibers drawing process.
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Sergey L. Semjonov, Alexander N. Denisov, Andrei K. Senatorov, "Fabrication of microstructured fibers from preforms with sealed top-end holes", Proc. SPIE 8961, Fiber Lasers XI: Technology, Systems, and Applications, 896129 (7 March 2014); doi: 10.1117/12.2037529; https://doi.org/10.1117/12.2037529
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