Neodymium doped Gadolinium Orthovanadate (Nd:GdVO4) is an excellent laser crystal. This crystal is ideal laser host material for the DPSS (Diode pumped Solid State) micro/mini lasers because of its good physical, optical and mechanical properties. It has higher slope efficiency than Nd:YAG and better thermal conductivity, higher power output than Nd:YVO4, therefore, it is a good choice to use Nd:GdVO4 for high power output DPSS lasers.
Basic Properties
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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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Specification:
1)
Orientation:
a-cut crystalline direction(+/-0.20)
2)
Dimensional tolerance:
+/-0.1mm(typical)High precision +/-0.005mm can be available upon request.
3)
Wavefront Distortion:
<l/8@633nm
4)
Surface quality:
better than 20/10 Scratch/Dig per MIL-O-1380A
5)
Parallelism:
< 10 arc seconds
6)
Perpendicularity:
< 5 arc minutes
7)
Surface flatness:
<l/10 at 632.8nm
8)
Clear aperture:
Central 95%
9)
Chamfer:
0.15x450
10)
Damage threshold:
over 15J/cm2 (rods without coating) over 700 MW/cm2 (coated)
11)
Coating:
1)AR@1063nm, R< 0.1% & HT@808nm, T>95%
2)HR@1063nm, R>99.8% & HT@808nm, T>95%
3)AR@1063 nm, R<0.1%