Nonlinear optical properties of antimony–germanium–sulfur glasses at 1560 nm
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- Gómez, L.A., de Araújo, C.B., Putvinskis, R. et al. Appl. Phys. B (2009) 94: 499. doi:10.1007/s00340-008-3275-0
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Nonlinear (NL) optical properties of antimony–germanium–sulfur (Sb–Ge–S) glasses were investigated using laser pulses of 65 fs at 1560 nm. Samples having concentration ratio [S]/[Ge]=2.69 with different antimony concentrations were studied. Glasses with different oxidation states of Sb were investigated using the thermallymanaged Z-scan technique. The influence of the Sb oxidation state on the NL properties was evaluated. NL refraction indices of electronic origin, n2≈10−13 cm2/W, two-orders of magnitude larger than for fused silica and NL absorption coefficients smaller than 0.55 cm/GW were measured. Appropriate figures-of-merit for photonic applications were determined.