N41 Nd:Glass

22 May 2019

Description

N41 Neodymium-doped phosphate glass has high stimulated emission cross section, low nonlinear refractive index and good thermal characteristics is specially for high power laser facilities. N41 has a lower refractive index than N21 and N31.

Parameter

Laser specifications

Nd2O3(wt%)	4.6
Nd3+ conc. (1020ions/cm3)	4.3±0.1
Cross section for stimulated emission	(10-20cm2) 3.9±0.1
Lifetime at 1053nm (μsec)*	≥370(Nd2O3：0.5wt%)
	≥360(Nd2O3：1.2wt%)
	≥315(Nd2O3：3.5wt%)
	≥310(Nd2O3：4.6wt%)
Effective bandwidth (nm)	25.5
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)	1.504±0.003
Abbe value	68.2

Thermal Specifications

Transformation temp. (℃)	467
Softening temp. (℃)	503
Coeff.of linear thermal expansion (10-7/K) (30~100℃)	129

Other Specifications

Density (g/cm3)	2.62
Young’s modulus (G Pa)	52.4
Posson’s ratio	0.25
Knoop hardness (kg/cm2)	347
Fracture toughness (MPa·m1/2)	0.62
Dw (H2O 98℃) (mg/(cm2/day))	0.41