22 May 2019 Description
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.
Parameter
Laser specifications
| 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) |
Optical Specifications
| 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 |
Thermal Specifications
| 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 |
Other Specifications
| 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 |
Spectra
 
Features
-
High energy storage
-
Large stimulated emission cross-section
-
Long fluorescence lifetime
-
Low nonlinear refractive index
Applications
High-power laser
Waveguide Amplifier
Ultra-short pulse laser experimental device |
