Nd:YAG

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Optics

Crystals

Nd:YAG

Nd:YAG rod is an excellent laser crystal for high energy application, it has a high thermal conductivity, and good optical quality.

Specifications
Dimension tolerance	±0.1mm
Angle tolerance	<0.5°
Surface flatness	l/8@632.8nm
Wavefront distortion	l/8@632.8nm
Surface quality	20-10
Parallelism	<20 arcsec
Perpendicularity	<5 arcmin
Clear aperture	>80%

f (mm)	Length (mm)
f4.0	50.0
f4.0	80.0
f6.35	102.0
f6.35	152.0

The following parameters are typically required to specify when ordering:

► Sizes Diameter x Length (mm)

► Nd dopant 0.9%, 1.0%, 1.1%

► Coating on S1&S2 (1) AR@1064nm, R<0.1%

(2) AR@1064nm, R<0.1% + HT@808nm, T>90%

Nd:YAG optical and physical properties.

Crystal structure Cubic

Lattice parameters A=B=C=12.01Å

Density 4.56g/cm3

Melting point 1970℃

Mohs hardness 8.5

Density 4.64g/cm3

Thermal expansion coefficient 7.8 x10-6/℃ [111]

Thermal conductivity 14w/m/k @20℃

Refractive index 1.82

Lasing wavelength 1064nm

Stimulated emission cross-section 2.8x10-19cm-2 @1064nm

Relaxation time of terminal 30ns

Spontaneous fluorescent 230ms 1 atomic %Nd

Radiative lifetime 550ms

Loss coefficient 0.003 cm-1 @1064nm

Absorption band at pump wavelength 1nm

Pump wavelength 807.5nm

Polarized emission unpolarized

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