Abstract

We report greatly enhanced femtosecond laser-induced precipitation of nonlinear optical crystals in glasses owing to the addition of silver. ${\text{Ba}}_2{\text{TiSi}}_2{\text{O}}_8$ (BTS) crystals were space-selectively precipitated inside a ${\text{Ag}}^{+}$-doped ${\text{BaO}–\text{TiO}}_2–{\text{SiO}}_2$ glass by using a focused femtosecond laser with 800 nm, 250 kHz, and 150 fs. The laser induced crystals were confirmed by micro-Raman spectra to be BTS phases. The irradiation time for crystallization in ${\text{Ag}}^{+}$-doped ${\text{BaO}–\text{TiO}}_2–{\text{SiO}}_2$ glasses was much shorter than that in undoped ${\text{BaO}–\text{TiO}}_2–{\text{SiO}}_2$ glasses under the same irradiation conditions. The mechanism responsible for the observed phenomenon is discussed.

© 2009 Optical Society of America

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