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Nd:YAG

Laser Crystals ---------Nd:YAG

Nd:YAG crystals are wildly used in all types of solid-state lasers systems-frequency-doubled

continuous wave, high-energy Q-switched, and so forth. Its good fluorescent lifetime thermal

conductivity and physical strengths makes it suitable for high power lamp pumped laser.

DeLn Optics general Nd:YAG production capabilities include:

Nd Dopant Concentration: 0.5-1.2 atm%tolerance within 10% of concentration

Diameter: 3 ~ 14mm

Length: 1~ 160mm

Orientation: <111> crystalline direction (+/-0.5℃)

Wavefront Distortion:
<l/10 at 632.8nm for 3 ~ 7mm

<l/8 per inch at 632.8nm for >=7mm

Surface Quality: better than 20/10 Scratch/Dig per MIL-O-1380A

Parallelism: < 10 arc seconds

Perpendicularity: < 5 arc minutes

Surface Flatness:
<l/10 at 632.8nm

Clear Aperture: Central 90%

Chamfer: 0.15x45^o

Damage Threshold: > 15J/cm2(uncoated )

> 700 MW/cm2(coated)

Coatings: a)AR@1064nm, R<0.1%;

b)AR@1064nm, R< 0.1%;HT@808nm, T>95%;

c)HR@1064nm, R>99.8%; HT@808nm, T>95%;

d)HR@1064nm, R>99.8%; HT@808nm, T>95%; HR@532nm, R>99%;

Chemical Formula Nd:Y3A15O12

Crystal Structure Cubic

Concentration ~ 1.2 x 1020 cm-3

Melting Point 1970 °C

Density 4.56 g/cm3

Mohs Hardness 8.5

Refractive Index 1.82

Thermal Expansion Coefficient 7.8 x 10-6 /K [111], 0 - 250 °C

Thermal Conductivity 14 W/m /K @20 °C, 10.5 W /m /K @100 °C.

　

Lasing Wavelength 1064 nm

Stimulated Emission Cross Section 2.8x10-19 cm-2

Relaxation Time of Terminal Lasing Level 30 ns

Radiative Lifetime 550 ms

Spontaneous Fluorescence 230 ms

Loss Coefficient 0.003 cm-1 @ 1064 nm

Effective Emission Cross Section 2.8 x 10-19 cm2

Pump Wavelength 807.5 nm

Absorption band at pump wavelength 1 nm

Linewidth 0.6 nm

Polarized Emission Unpolarized

Thermal Birefringence High

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