Proceedings PaperNew non-destructive method for testing refraction in half-finished gradient optical fiber
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The refraction factor profile (RFP) in a gradient optical fiber light guide determines information channel capacity of a fiber transmission line and should be tested with an error of about 10-4. Of the greatest interest in RFP studying in half-finished light guide fiber as soon as precise knowledge of the RFP values results in preliminary selection of non- conditions wires before their stretching out, along with opportunity to improve the technology. Transverse interferometry is one of the most precise non-destructive methods for this purpose. Commonly, one uses Mach-Zender interferometer which has unfortunately high vibration sensitivity, that complicates the interferometer adjustment and prevents the user from obtaining high contrast and low noise interferograms. In the present report the Moire method's possibilities to solve the problem are discussed.