Laser Specifications
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Nd _2 O_3 (wt %): 4.0
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Nd^3+ conc. (10^20 ions / cm^3): 3.9 ± 0.1
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Cross section for stimulated emission (10^-20 cm^2): ​​4.3 ± 0.1
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Lifetime at 1053 nm (μsec)*:
​
​≥ 375 (Nd_2 O_3 : 0.5 wt %)
​≥ 365 (Nd_2 O_3 : 1.2 wt %)
​≥ 320 (Nd_2 O_3 : 3.5 wt %)
​≥ 315 (Nd_2 O_3 : 4.2 wt %)
​
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Effective bandwidth (nm): ​24.5
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Fluorescence peak wavelength (nm)​: ​1053
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Absorption coefficient (cm^-1):
​​
≤ 0.0015 (1053 nm)
≤ 0.25 (400 nm)
≤ 1.5 (3333 nm)
Optical Specifications
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Non-linear refractive index coeff. n_2 (× 10^-13 e.s.u): ≤ 1.04
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Refractive index (1053 nm): 1.505 ± 0.003
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Abbe value: 68.2​
​​
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dn/dT (10^-6 / ºC) (20 ~ 100 ºC): - 9.0
Thermal Specifications
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Transformation temp. (ºC): 408
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Softening temp. (ºC): 448
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Coeff. of linear thermal expansion (10^-7 / K) (30 ~ 100 ºC): 141
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Coeff. of linear thermal expansion (10^-7 / K) (30 ~ 300 ºC): 160
​​
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Thermal coeff. of optical path length (10^-6 / K) (50 ~ 100 ºC): -1.9
Chemical Specifications
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D_w (H_2O 98ºC) (mg / (cm^2/day)): 2.2
Other Specifications
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Density (g / cm^3): 2.70​
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Young’s modulus (G Pa): 45.2
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Posson’s ratio: 0.26
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Knoop hardness (kg / cm^2): 302
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Fracture toughness (MPa· m ^1/2): 0.66