N51 Neodymium-doped phosphate glass has the characteristics of high energy storage, large stimulated emission cross-section, long fluorescence lifetime, and easy preparation of large size and good optical uniformity. Therefore, it is widely used as an amplifier working substance in a high-power laser system.
| Nd2O3(wt%) | 4.0 |
| Nd3+ conc. (1020ions/cm3) | 3.9±0.1 |
| Cross section for stimulated emission (10-20cm2) | 4.3±0.1 |
| Lifetime at 1053nm (μsec)* | ≥375(Nd2O3：0.5wt%) |
| ≥365(Nd2O3：1.2wt%) | |
| ≥320(Nd2O3：3.5wt%) | |
| ≥315(Nd2O3：4.2wt%) | |
| Effective bandwidth (nm) | 24.5 |
| Fluorescence peak wavelength (nm) | 1053 |
| Absorption coefficient (cm-1) | ≤0.0015(1053nm) |
| ≤0.25(400nm) | |
| ≤1.5(3333nm) |
| Non-linear refractive index coeff.n2 (×10-13e.s.u) | ≤1.04 |
| Refractive index (1053nm) | 1.505±0.003 |
| Abbe value | 68.2 |
| dn/dT (10-6/℃) (20~100℃) | -9.0 |
| Transformation temp. (℃) | 408 |
| Softening temp. (℃) | 448 |
| Coeff.of linear thermal expansion (10-7/K) (30~100℃) | 141 |
| Coeff.of linear thermal expansion (10-7/K) (30~300℃) | 160 |
| Thermal coeff.of optical path length (10-6/K) (50~100℃) | -1.9 |
| Density (g/cm3) | 2.7 |
| Young’s modulus (G Pa) | 45.2 |
| Posson’s ratio | 0.26 |
| Knoop hardness (kg/cm2) | 302 |
| Fracture toughness (MPa·m1/2) | 0.66 |
| Dw (H2O 98℃) (mg/(cm2/day)) | 2.2 |
High energy storage
Large stimulated emission cross-section
Long fluorescence lifetime
Low nonlinear refractive index
High-power laser
Waveguide Amplifier
Ultra-short pulse laser experimental device