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- 掺钕钇铝石榴石(Nd:YAG)
掺钕钇铝石榴石(Nd:YAG)
掺钕钇铝石榴石(Nd:YAG):Nd:YAG是最早和最著名的激光晶体。由于它的很多基本性能优越， Nd:YAG常被用于近远红外固态激光及其倍频，三倍频应用中。
Advantages of Nd:YAG crystals
- High gain
- Low threshold
- High efficiency
- Low loss
- Suitable for different modes of operation (cw, pulsed , Q-switched,
- mode locked, doubling of frequency )
- Suitable for high-average power lasers
- Good thermal conductivity and thermal shock characteristics
- Large mechanical strength
- High optical quality
Capabilities:
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Nd dopant:
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0.6 ~ 1.3 atm%
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Diameter:
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3 ~ 14mm
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Length:
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1 ~ 160mm
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Specifications:
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Orientation:
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<111> or <100> within 5°
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Dimensional Tolerance:
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+/-0.1mm
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Wavefront Distortion:
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<λ/8 at 633nm
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Surface Quality:
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20/10
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Parallelism:
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< 10 arc seconds
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Perpendicularity:
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< 5 arc minutes
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Surface Flatness:
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<λ/10 at 633nm
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Clear Aperture:
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Central 95%
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Chamfer:
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0.15x45°
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Coating:
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1.AR@1064nm R<0.2%
2.AR@1064nm R< 0.2% & HT@808nm T>95% 3.HR@1064nm R>99.8% & HT@808nm T>95% 4.HR@1064nm R>99.8% & HR@532nm R>99% & HT@808nm T>95% |
Properties:
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Chemical Formula
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Nd:Y3A15O12
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Crystal Structure
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Cubic
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Lattice Constants
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12.01Ä
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Concentration
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~ 1.2 x 1020 cm-3
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Melting Point
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1970 °C
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Density
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4.56 g/cm3
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Mohs Hardness
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8.5
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Refractive Index
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1.82
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Thermal Expansion Coefficient
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7.8 x 10-6 /K [111], 0 - 250 °C
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Thermal Conductivity
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14 W/m /K @20 °C, 10.5 W /m /K @100 °C.
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Lasing Wavelength
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1064 nm
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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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30 ns
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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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Loss Coefficient
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0.003 cm-1 @ 1064 nm
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Effective Emission Cross Section
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2.8 x 10-19 cm2
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Pump Wavelength
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807.5 nm
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Absorption band at pump wavelength
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1 nm
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Linewidth
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0.6 nm
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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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Note: Kinds of sizes, coating are available upon request.
