Q switching of a diode-pumped Nd3+:KGd(WO4)2 laser at 1.35 μm by use of cobalt-doped magnesium- and zinc-aluminosilicate glass ceramics as saturable absorbers is demonstrated. Q-switching efficiency up to 40% has been obtained. Ground-state absorption cross sections for Co2+ ions at the wavelengths of 1.35 and 1.54 μm are estimated to be (3.5–4.0) × 10-19 cm2. Bleaching relaxation times under the excitation of the 4A2 → 4T1(4F) transition of tetrahedrally coordinated Co2+ ions are of 280 ± 50 ns and 700 ± 80 ns for magnesium- and zinc-aluminosilicate glass ceramics, respectively.
© 2004 Optical Society of America
Original Manuscript: May 7, 2003
Revised Manuscript: October 14, 2003
Published: January 20, 2004
Yuri V. Volk, Igor A. Denisov, Alexander M. Malyarevich, Konstantin V. Yumashev, Olga S. Dymshits, Alexander V. Shashkin, Alexander A. Zhilin, Uk Kang, and Kyeong-Hee Lee, "Magnesium- and zinc-aluminosilicate cobalt-doped glass ceramics as saturable absorbers for diode-pumped 1.3-μm laser," Appl. Opt. 43, 682-687 (2004)