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        • Product name: Nd:YAG
        • Product ID: 112
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        description:

        Neodymium Doped Yttrium Aluminum Garnet (Nd:YAG ) Crystal
        Nd:YAG is the earliest and most famous laser host crystal. Since it combines great advantages in many basic properties, Nd:YAG is the ubiquitous presence for near-infrared solid-state lasers and their frequency-doubler, tripler, and higher order multiplier.

        Basic Properties of Nd:YAG:

        Chemical Formula:

        Y3Al5O12

        Crystal structure:

        Cubic

        Lattice constant:

        12.01Å

        Melting point:

        1970°C

        Density:

        4.5g/cm3

        Reflective Index:

        1.82

        Thermal Expansion Coefficient:

        7.8x10-6 /K <111>

        Thermal Conductivity (W/m/K):

        14, 20°C

        10.5, 100°C

        Mohs hardness:

        8.5

        Stimulated Emission Cross Section:

        2.8x10-19 cm-2

        Relaxation Time of Terminal Lasing Level:

        30 ns

        Radiative Lifetime:

        550 us

        Spontaneous Fluorescence:

        230 us

        Linewidth:

        0.6 nm

        Loss Coefficient:

        0.003 cm-1 @ 1064nm

             

         Specifications of Nd:YAG crystal from CASTECH :

        · Dimension: size up to dia.15x160mm and maximum diameter of dia.40mmx2mm
        · Nd Dopant Level: 0.3~2.0(±0.1)atm%
        · Diameter tolerance: ±0.05mm
        · Length tolerance: ±0.5mm
        · Perpendicularity: < 5 arc minutes
        · Parallelism: <10 arc seconds
        · Wavefront distortion: λ/8
        · Flatness: λ/10
        · Sccratch/Dig: 10/5 @MIL-PRF-13830B
        ·Chamfer: 0.1mmx45°
        · HR-Coating: R>99.8%@1064nm and R<5%@808nm
        · AR-Coating (Single layer MgF2): R<0.25% per surface (@1064nm)
        · Other HR coatings, such as HR @ 1064/532 nm, HR @ 946nm, HR 1319 nm and other wavelengths are also        available.
        · Damage Threshold: >500MW/cm^2

        Optical Parameter of Nd:YAG crystal

        Diameter (mm) Standard grade Excellence grade Superexcellence grade
        φ3-6.35 ≤0.5 fringes/ inch ≤0.25 fringes/ inch ≤0.1 fringes/ inch
        ≥25dB ≥28dB ≥30dB
        φ7-10 ≤0.7 fringes/ inch ≤0.4 fringes/ inch ≤0.16 fringes/ inch
        ≥22dB ≥25dB ≥28dB
        φ11-13 ≤1 fringes/ inch ≤0.6 fringes/ inch ≤0.2 fringes/ inch
        ≥20dB ≥23dB ≥26dB
        φ14-16 ≤1.2 fringes/inch ≤0.8 fringes/inch ≤0.25 fringes/inch
        ≥18dB ≥20dB ≥23dB

        Higher grade or specific Nd:YAG rods or slabs,and Nd:YAG rods for 946 nm and 1319 nm lasers can be provided.Er:YAG,Yb:YAG and other ion doped YAG crystals are also available upon request.