Radiation-optical stability of lowloss glass-fiber waveguides

An investigation was made of the radiation-optical stability of SiO₂:GeO₂–SiO₂ and SiO₂–SiO₂:B₂O₃ glassfiber waveguides. The induced absorption spectra in the 0.45–1.75 μ wavelength range were obtained by altering the gamma-radiation dose between 10³ and 10⁸ rad. An investigation was made of the growth kinetics of the induced absorption of the waveguides during gamma irradiation and of the induced absorption decay kinetics after irradiation.