, Volume 48, Issue 4, pp 491-497

A Setup for Investigating Induced Refractive Index Change in Optical Fibers at High Temperatures

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An automated experimental setup for investigating the mechanisms of refractive index change in optical fibers at high temperatures is described. A resistive furnace that allows a section of an optical fiber to be heated from room temperature to 1200°C at a given rate was developed. The results from experiments on annealing gratings formed in a germanosilicate fiber with 14 mol % GeO2 in the fiber core are presented. The temperature stability of photoinduced fiber refractive index gratings at different demarcation energies was calculated on the basis of the data obtained.

Translated from Pribory i Tekhnika Eksperimenta, No. 4, 2005, pp. 76–83.
Original Russian Text Copyright © 2005 by Bozhkov, Vasil’ev, Medvedkov, Grekov, Korolev.