Nd-doped Fluorophosphate glass has the characteristics of low nonlinear coefficient, high fluorescence lifetime, easy large-scale preparation, excellent glass forming performance and good crystallization stability, and meets the requirements for energy storage and amplification of high-energy laser systems. Two kinds of NF glass.
| NF1 | NF2 | |
| NdF3 (wt%) | 0.88 | 1.07 |
| Nd3+conc.(1020ions/cm3) | 0.2±0.1 | 1.2±0.1 |
| Cross section for stimulated emission(10-20cm2) | 2.7±0.1 | 3.4±0.1 |
| Lifetime at 1053nm(μsec) | ≥515(NdF3:0.53wt%) | ≥430(NdF3:0.53wt%) |
| ≥495(NdF3:1.07wt%) | ≥410(NdF3:1.07wt%) | |
| Effective bandwidth(nm) | 32.8 | 30.4 |
| Fluorescence peak wavelength(nm) | 1053 | 1053 |
| Absorption coefficient(cm-1) | ≤0.001(1053nm) | ≤0.001(1053nm) |
| ≤0.04(400nm) | ≤0.04(400nm) | |
| ≤0.08(3333nm) | ≤0.08(3333nm) |
| NF1 | NF2 | |
| Non-linear refractive index coeff.n2( ×10-13e.s.u) | ≤0.6 | ≤0.86 |
| Refractive index(1053nm) | 1.464±0.003 | 1.514±0.003 |
| Abbe value | 88 | 77 |
| dn/dT | -8.84 | -8.6 |
| NF1 | NF2 | |
| Transformation temp.(℃) | 450 | 490 |
| Softening temp.(℃) | 491 | 528 |
| Coeff. of linear thermal expansion(10-7/K)(50~100℃) | 152 | 142 |
| Thermal coeff. of optical path length(10-6/K)(50~100℃) | -1.86 | -1.2 |
| Thermal conductivity(25℃)(W/mK) | 0.865 |
| NF1 | NF2 | |
| Density(g/cm3) | 3.65 | 3.68 |
| Young’s modulus(G Pa) | 73 | 76 |
| Knoop hardness(kg/cm2) | 343 | 423 |
| Fracture toughness(MPa·m1/2) | 0.35 | 0.58 |
Low nonlinear coefficient
High fluorescence lifetime
Good glass forming performance
Good crystallization stability
High coefficient of thermal expansion
Laser amplifiers
Microstructured optical fiber laser(MOF)
High average power laser
High-energy laser fusion system