By Victor Flores,2014-02-08 15:31
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Excellent laser material for DPSS laser

    NdYAG Crystal

    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:

    ?Orientation: <111> or <100> within 5

    Dimensional Tolerance: Diameter +/-0.1mm ,Length+/-0.5mm

    Wavefront Distortion: <λ/8 at 633nm per inch

    Surface Quality: 20/10

    Parallelism: < 10 arc seconds

    Perpendicularity: < 5 arc minutes

    Surface Flatness: <λ/10 at 633nm

    Clear Aperture: Central 95%

    ?Chamfer: 0.15x45

    1.AR@1064nm R<0.2%

    2.AR@1064nm R< 0.2% & HT@808nm T>95% Coating: 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 Tel: +86-591-83676250 Fax: +86-591-83652571

    Specificaiton of Slab of NdYAG Width 3mm to 20mm

    Height 3mm to 12mm

    Length 20mm to 150mm

    S1&S2 <λ/10 at 633nm Flatness S3&S4 <λ/4 at 633nm Perpendicularity < 3 arc minutes

    Parallelism Customized by customer

     Surface quality S1,S2 S3,S4 10/5 per MIL-0-13830B Coating Customized by customer

Properties of NdYAG:

    Chemical Formula Nd:YAO 31512

    Crystal Structure Cubic

    Lattice Constants 12.01Ä

    -3Concentration ~ 1.2 x 1020 cm Melting Point 1970 ?C

    3Density 4.56 g/cm

    Mohs Hardness 8.5

    Refractive Index 1.82

    -6Thermal Expansion Coefficient 7.8 x 10 /K [111], 0 - 250 ?C Thermal Conductivity 14 W/m /K @20 ?C, 10.5 W /m /K @100 ?C.

     Lasing Wavelength 1064 nm

    -19-2Stimulated Emission Cross Section 2.8x10 cm Relaxation Time of Terminal Lasing 30 ns Level

    Radiative Lifetime 550 ms

    Spontaneous Fluorescence 230 ms

    -1Loss Coefficient 0.003 cm @ 1064 nm

    -192Effective Emission Cross Section 2.8 x 10 cm Pump Wavelength 807.5 nm

    Absorption band at pump 1 nm wavelength

    Linewidth 0.6 nm

    Polarized Emission Unpolarized Thermal Birefringence High

NOW, Diffusion bonding crystal with NdYAG is avalible. Please sent enquiry us. Tel: +86-591-83676250 Fax: +86-591-83652571

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