Nonlinear optical properties of antimony–germanium–sulfur glasses at 1560 nm
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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 thermally managed Z -scan technique. The influence of the Sb oxidation state on the NL properties was evaluated. NL refraction indices of electronic origin, n 2≈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.
PACSN.42.65.An 42.70.-a 42.70.Ce 78.20.-e 78.20.Ci
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