ND:YAG Crystal (Neodimium Doped Yttrium Aluminum Garnet)

Crystals >>> Laser Crystals >>>  ND:YAG Crystal

Invented in the sixties of the last century, Nd:YAG(Neodimium Doped Yttrium Aluminum Garnet) has been and continue to be the most widely used laser crystal for solid-state crystal material.  Its laser parameters are a good compromise between the strengths and weaknesses of its competition.  Nd:YAG crystals are used in all types of solid-state lasers systems-frequency-doubled continuous wave, high-energy Q-switched, and so forth. Compared with others laser crystals, its fluorescence lifetime is twice more than Nd:YVO4, and thermal conductivity is also better.  Red Optronics supplies quality Nd:YAG rods with high optical homogeneity, consistent performance, and high processing accuracy.   


  • Nd:YAG can produce blue laser with the frequency-doubling of 946nm

  • Nd:YAG can be operated in a very high power laser up to kw level

  • Nd:YAG can be Q-switched with Cr4+YAG directly

  • Due to the cubic symmetry and high quality, Nd:YAG is easy to operate with TEM00 mode

Main Specifications  
Nd dopant concentration
Dopant tolerance
0.7---1.3 atm%
within 10% of concentration.
Diameter 3 ~ 14mm
Length 1~ 160mm
Anti-reflection Coating
High transmission Coating
High reflection Coating
R<0.1 @ 1064nm
T>95% @ 808nm
R>99.8% @ 1064nm
Orientation <111> crystalline direction (+/-5℃)
Wavefront Distortion <λ/10 per inch at 632.8nm for 3 ~7mm
>λ/10 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 <λ/10 at 632.8nm
Clear aperture Central 95%
Chamfer 0.15x45
Damage threshold over 15J/cm2 (rods without coating )
over 700 MW/cm2 (coating)

To inquire or order a finished Nd:YAG laser rod, please provide specifications as listed in the above.  For general application, we only need to know the main specifications: Nd-dopant concentration, sizes, and coating.  For special request, please provide specification in details for evaluation and fabrication.

Physical and Chemical Properties  
Chemical Formula Nd:Y3A15O12
Crystal Structure Cubic Garnet
Lattice Constants 12.01
Concentration ~ 1.2 x 1020 cm-3
Melting Point 1970C (2240K)
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.
Physical and Optical properties
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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