Glass-ceramics with γ-Ga2O3:Co2+ nanocrystals: saturable absorber for 1.5–1.7 μm Er lasers. (13th February 2015)

• Record Type: Journal Article
• Authors: Loiko, P A; Dymshits, O S; Vitkin, V V; Skoptsov, N A; Kharitonov, A A; Zhilin, A A; Alekseeva, I P; Zapalova, S S; Malyarevich, A M; Glazunov, I V; Yumashev, K V
• Is Part Of: Laser physics letters. Volume 12:Number 3(2015:Mar.)
• Publication Date: 2015-02-13
• Subjects: glass-ceramics -- cobalt -- erbium laser -- Q-switching; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-2011/12/3/035803
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: Transparent glass-ceramics containing γ -Ga2 O3 :Co 2+ 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 4 A2g ( 4 F) → 4 T1g ( 4 F) transition of Co 2+ ions in tetrahedral sites for these glass-ceramics is red-shifted up to ~1.8 μ m. 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.