Abstract
Transparent glass-ceramics containing γ-Ga2O3:Co2+ nanosized (7–12 nm) crystals are synthesized in a lithium gallium silicate system. Their spectroscopic and nonlinear properties are studied. The absorption band related to the 4A2g(4F) → 4T1g(4F) transition of Co2+ ions in tetrahedral sites for these glass-ceramics is red-shifted up to ~1.8 μm. The absorption saturation fluence is determined to be ~0.8 J cm−2. The developed glass-ceramics are used for passive Q-switching of diode-pumped Er,Yb:glass laser delivering 1.75 mJ 25 ns-long pulses at 1540 nm.
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