ND:YAG
Neodymium Doped Yttrium Aluminum Aluminum Garnet(Nd:YAG)Crystal
Neodymium Doped Yttrium Aluminum Garnet-Nd:Y3A15O12(Nd:YAG) with high efficiency, high beam damage threshold and good heat conductivity ,has been applied to
activate and sensitize ion so as to enhance the laser output. Therefore, it has been continuous to be the most widely used solid state laser material. At room temperature, it can work in continuous, pulsed and many other modes in which the continuous modes is its most efficient mode whose laser output has reached KW level.
Basic properties of Nd:YAG crystal
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Chemical Formula:
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Nd:Y3Al5O12
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Crystal Structure:
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Cubic
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Lattice Constant:
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12.01Å
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Melting Point:
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1970°C
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Density:
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4.5g/cm3
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Refractive Index
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1.82
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Thermal Expansion Coefficient:
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7.8x10-6 /K <111>
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Thermal Conductivity（w/m/k）:
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14,20°C
10.5,100°C |
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Mohs Hardness:
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8.5
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Stimulated Emission Cross-Section:
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2.8x10-19 cm-2
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Relaxation Time of Terminal Lasing Level:
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30ns
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Radiative Lifetime:
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550 ms
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Spontaneous Fluorescence:
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230 ms
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Linewidth:
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0.6nm
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Pump Wavelength:
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807.5nm
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Polarized Emission:
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Unpolarized
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Thermal Birefringence
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High
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Pump Wavelength Absorption Band:
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1nm
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Loss Coefficient:
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u Advantages:
l High gain, low threshold, high efficiency
l Low loss at 1.06 um, high optical quality
l Good mechanical and thermal properties
l Easy to operate in TEM00 mode
l A variety of operate modes (continuous, pulsed, Q-switched, mode-locking)
Basic properties of Nd:GdVO4 crystal
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Crystal Structure
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Tetragona
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Space Group
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I41/amd
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Lattice Parameter
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a=0.721nm, b=0.635nm
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Lasing Transition
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4F3/2 → 4I11/2
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Lasing Wavelength
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1062.9nm
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Emission Cross Section (at 1064nm)
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7.6x10-19 cm2
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Absorption Cross Section (at 808nm)
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4.9x10-19 cm2
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Absorption Coefficient (at 808nm)
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74cm-1
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Index of Refractivity (at 1064nm)
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n0=1.972, ne=2.192
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Thermal Conductivity (<110>)
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11.7W/(mxK)
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Density
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5.47g/cm3
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Nd Dopant Level (atomic)
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0.1%, 0.2%, 0.3%, 0.5%, 0.7%, 1.0%...
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