Nd:YAG has been and continues to be the most mature and most widely used crystals for lasers, no matter solid state or lamp pumped, CW or pulsed.It possesses a combination of properties uniquely favorable for laser operations. We have developed the state-of-the-art crystal growing technology to enable the availability of large, high quality crystal
Lasertec’s Specifications of Nd-YAG Crystal:
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Orientation:
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<111> or <100> within 5°
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Dimensional Tolerance:
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Diameter +/-0.1mm ,Length+/-0.5mm
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Wavefront Distortion:
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<λ/8 at 633nm per inch
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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% |
NdYAG with hot application in slab lasers.
Slab lasers represent one class of high-power solid-state bulk lasers, where the gain medium (laser crystal) has the form of a slab. Typically, a laser slab is thin in one dimension, compared with the larger extent in the other two directions. However, other lasers without a large aspect ratio of the gain medium are sometimes also called slab lasers, simply because their gain medium has a rectangular rather than a circular cross-section. Such lasers are actually often not very different from rod lasers, also in terms of power scaling
Specificaiton of Slab of NdYAG
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Width
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3mm to 20mm
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Height
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3mm to 12mm
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Length
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20mm to 150mm
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Flatness
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S1&S2 <λ/10 at 633nm
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S3&S4 <λ/4 at 633nm
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Perpendicularity
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< 3 arc minutes
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Parallelism
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Customized by customer
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Surface quality
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S1,S2 S3,S4 10/5 per MIL-0-13830B
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Coating
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Customized by customer
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Properties of NdYAG:
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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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NOW, Diffusion bonding crystal with NdYAG is avalible. Please sent enquiry us.