NdGlass

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					                                        Nd:glass
High-power laser glass---Nd:glass(N21 and N31)
Nd doped phosphate glass have been widely used in high average
power laser solid state lasers,laser material processing, range
finder and other industrial and scientific applications。
Lasertec's mainly offers two types of Nd 3+ doped phosphate glasses-N21and N31. Lasertec's
Nd 3+ phosphate glasses are guaranteed in optical qualities such as homogeneity, striation, stress
birefringence, Pt inclusions etc. The different neodymium doping phosphate glasses are ready for
your quest. We have stocked 0.7%, 3.0%, and 4.0% doped N31 and N21.
Table Properties of Nd 3+ -doped phosphate glass
Laser properties                                                         N21          N31
Nd 2 O 3 (wt%)                                                           2.2          2.2
Nd 3+ conc. (10 20 ions/cm 3 )                                           2.68         2.26
Cross section for stimulated emission(10 -20 cm 2 )                      3.40±0.3     4.0±0.3
lift time (usec)                                                         330          340±10
Fluorescence half-line width at 290ºK(Å)                                 240          201
Center lasing wavelength (nm)                                            1059         1059
OPTICAL PROERTIES
Non-linear refractive index coeff.n 2 (×10 -13 e.s.u)                    1.3±0.1      1.1±0.1
n(1053nm)                                                                1.5652       1.5280
nd                                                                       1.5758       1.5357
nF                                                                       1.5731       1.5413
nc                                                                       1.5820       1.5332
Abbe value                                                               65.3         66.2
dn/dT (10 -6 /ºC) (20~100ºC)                                             -4.2         -4.3
Coeff.of linear thermal expansion (10 -6 /ºC)(20~100ºC)                  11.0         10.7
Thermal coeff. (10 -6 /ºC) (20~100ºC)                                    1.9          1.4
THERMAL PROPERTIES
Transformation temp.(ºC)                                                 500          430
Softening temp.(ºC)                                                      530          475
Coeff.of linear thermal expansion (10 -6 /ºC) (100~TgºC)                 12.0         12.7
Thermal conductivity (25ºC) (10 -3 W/cmºC)                               5.53         5.58
Specific heat ( 25ºC) (J/cm 3 ºC)                                        0.75         0.75
Specification of NdGlass rod
Dimension Tolerances         Rods with diameter: ±0.025 mm , Length: ±0.5 mm
Surface quality:             10/5 Scratch / Digper MIL-O-1380A
Parallelism:                 < 10 arc seconds
Wavefront distortion :       Lambda /8 per inch @ 633 nm
Extinction Ratio:            >25dB
AR Coating Reflectivity      < 0.25% @1060nm

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posted:3/31/2012
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