Abstract
We report what is believed to be the first observation of permanent photoreduction of to in transparent and colorless -doped fluorozirconate glass at room temperature, using an infrared femtosecond laser. Difference absorption and electron-spin-resonance spectra of the glass before and after laser irradiation showed that a portion of the ions in the focused part of the laser inside the glass were reduced to ions after laser irradiation. It is suggested that ions act as electron-trapping centers, whereas active sites in the glass matrix act as hole-trapping centers, leading to the formation of ions. The observed phenomenon is inferred to be useful in the fabrication of optical memory devices with high storage density and waveguide-type micro-optical devices.
© 1999 Optical Society of America
Full Article | PDF ArticleMore Like This
Koji Fujita, Masayuki Nishi, and Kazuyuki Hirao
Opt. Lett. 26(21) 1681-1683 (2001)
E. Pavel, I. N. Mihailescu, A. Hening, V. I. Vlad, Laura Tugulea, L. Diamandescu, I. Bibicu, and M. Chipara
Opt. Lett. 23(16) 1304-1306 (1998)
Jianrong Qiu, Nobuhiro Kodama, Mitsuo Yamaga, Kiyotaka Miura, Tsuneo Mitsuyu, and Kazuyuki Hirao
Appl. Opt. 38(35) 7202-7205 (1999)