NSG2
NSG2 is an Nd^3+ doped silicate glass that has a high cross section for stimulated emission, broad effective emission width and high thermal stability properties.
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Laser Specifications
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Cross section for stimulated emission (10^-20 cm^2): 2.7 ± 0.1
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Lifetime at 1053 nm (μsec)*:
≥ 380 (Nd_2 O_3 : 0.5 wt %)
≥ 380 (Nd_2 O_3 : 1.0 wt %)
≥ 380 (Nd_2 O_3 : 2.0 wt %)
≥ 380 (Nd_2 O_3 : 3.0 wt %)
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Effective bandwidth (nm): 34.0
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Fluorescence peak wavelength (nm): 1060
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Absorption coefficient (cm^-1): ≤ 0.0015 (1053 nm)
Optical Specifications
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Non-linear refractive index coeff. n_2 (× 10^-13 e.s.u): ≤ 1.6
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Refractive index (1053 nm): 1.560 ± 0.003
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Abbe value: 59
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dn/dT (10^-6 / ºC) (20 ~ 100 ºC): 2.0
Thermal Specifications
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Transformation temp. (ºC): 485
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Softening temp. (ºC): 530
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Coeff. of linear thermal expansion (10^-7 / K) (30 ~ 100 ºC): 95
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Coeff. of linear thermal expansion (10^-7 / K) (30 ~ 300 ºC): 102
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Thermal coeff. of optical path length (10^-6 / K) (50 ~ 100 ºC): 7.0
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Thermal conductivity (25 ºC) (W / m K): 1.2
Other Specifications
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Density (g / cm^3): 2.55