A microscopic bright-field image technique for the measurement of averaged index profiles of quasi-axially symmetric large-mode-area microstructured fibers |
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Authors: | E Saucedo Casas V P Minkovich |
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Institution: | (1) Centro de Investigaciones en Optica, A. C. Loma del Bosque 115, Colonia Lomas del Campestre, León Gto, 37150, México |
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Abstract: | We report on a nondestructive and noninterferometric technique for the experimental investigation of an approximation for the averaged index profile of quasi-axially symmetric large-mode-area microstructured optical fibers (MOFs). MOFs with a solid silica core surrounded by cladding, which consists of a system of air channels in silica, running along the fiber in a hexagonal structure around the core were analyzed. We used the transversal gradient of the phase, which was obtained from microscopic bright-field images of the studied quasi-axially symmetric MOFs. The inverse Abel transform was then applied to receive the approximation of the averaged index profile of the tested MOFs. The results of our investigations are presented. |
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