22 May 2019 Description
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.
Parameter
Laser Specifications
| |
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) |
Optical Specifications
| |
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 |
Thermal Specifications
| |
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 |
|
Other Specifications
| |
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 |
Spectra
Features
-
Low nonlinear coefficient
-
High fluorescence lifetime
-
Good glass forming performance
-
Good crystallization stability
-
High coefficient of thermal expansion
Applications
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