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ND:YAG CRYSTALS Download PDF document

Although Nd:YAG was invented in the Sixties last century, it has been and is still the most commonly used solid-state crystal material. 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.

Physical and Optical Properties:
Properties
Values
Chemical Formula Nd:Y3A15O12
Crystal Structure Cubic
Lattice Constants 12.01?
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
 
Our Manufacture Technical Capabilities:
Properties
Values

Nd Dopant Concentration:

0.5-1.2 atm%tolerance within 10% of concentration

Diameter:

3 ~ 14mm

Length:

1~ 160mm

Orientation:

<111> crystalline direction (+/-0.5íŠ)

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:

0.15x45o

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%

 
NOTES!  
Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
 
 
 
   
product Index
CRYSTALS-INDEX
OPTICAL CRYSTALS
 
Undoped YVO4
 
LiNbO3 Crystals
 
Undoped YAG
 
Sapphire Crystals
LASER CRYSTALS
 
Nd:YVO4 Crystals
 
Nd:GdVO4 Crystals
 
Nd:YAG Crystals
 
Ti:Sapphire Crystals
OPTICS-INDEX
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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