Laser Crystal Grooved Nd:YAG
Overview:
The grooved Nd:YAG laser rods have the improvements on the beam quality, thermal effect reduction and the efficiency when compared with the common Nd:YAG laser rods.
General Specifications Of Grooved Nd:YAG:
Nd Dopant Level |
0.5-1.1 atm% |
Orientation |
<111> crystalline direction (±0.5deg) |
Dimension Tolerances |
Diameter: ±0.05mm |
Length: ±0.5mm |
Surface Quality |
10/5 Scratch and Dig |
Clear Aperture |
>90% |
Surface Flatness |
<λ/10@633nm |
Wavefront Distortion |
<λ/8@633nm |
Parallelism |
<10 arc seconds |
Perpendicularity |
<5 arc minutes |
Chamfer |
<0.1mmx45° |
AR Coating |
Reflectivity R<0.25%@1064 nm per surface
Damage threshold over 750MW/cm2@1064nm, 10 ns and 10 Hz
Other coating is per your request |
Extinction Ratio |
Rods with diameter from 3 mm to 6.35 mm and with length to 100 mm: >30dB
Rods with diameter from 7 mm to 10 mm and with length to 100 mm: >28dB |
Physical Properties of Grooved Nd:YAG:
Chemical Formula |
Nd:Y3Al5O12 |
Crystal Structure |
Cubic |
Lattice Constants |
12.01 |
Concentration |
~1.2 x 1020 cm-3 |
Melting Point |
1970℃ |
Density |
4.56 g/cm3 |
Mohs Hardness |
8.5 |
Refractive Index |
1.82 |
Thermal Conductivity |
14 W/m /K @20℃, 10.5 W /m /K @100℃ |
Thermal Expansion Coefficient |
7.8 x 10-6/K [111], 0 - 250℃ |
Optical Properties of Grooved Nd:YAG:
Lasing Wavelengths |
1064nm |
Photon Energy |
1.86x10-19J@1064nm |
Stimulated Emission Cross-Section |
2.8x10-19cm2 |
Relaxation Time of Terminal Lasing Level |
30ns |
Radiative Lifetime |
550us |
Spontaneous Fluorescence |
230us |
Loss Coefficient |
0.003 cm-1@1064nm |
Pump Wavelength |
807.5 nm |
Absorption band at pump wavelength |
1nm |
Linewidth |
0.6nm |
Polarized Emission |
Unpolarized |
Thermal Birefringence |
High |
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