Femtosecond Laser Induced Color-center in Phosphate Glasses
强光致磷酸盐激光玻璃的色心及其ESR研究

Laser-induced darkening in phosphate laser glasses irradiated by an 800nm, 120fs, 1kHz Ti:sapphire laser was studied for the first time. The ESR spectra of irradiated glass shows laser-induced darkening results from color-center generation through multi-photon absorption. The type of the color-center as hole trapped on non-bridging oxygen.