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Nd:YAG

 

Description:

Nd:YAG (neodymium-doped yttrium aluminium garnet; Nd:Y3Al5O12) is a crystal that is used as a lasing medium for solid-state lasers. The dopant, triply ionized neodymium, typically replaces yttrium in the crystal structure of the yttrium aluminium garnet (YAG), since they are of similar size. Generally the crystalline host is doped with around 1% neodymium by atomic percent.

 

Features:

  • High Gain, Low Threshold, High Efficiency;

  • Low Loss at 1.06 mm, High Optical Quality;

  • Good Mechanical and Thermal Properties;

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

 

Applications:

  • 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 at 1064nm;

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

  • Nd:YAG can be used for high power green laser for SHG@1064nm.

 

Optical Properties:

Stimulated Emission Cross Section2.8x10-19 cm2
Relaxation Time of Terminal Lasing Level30 ns
Radiative Lifetime550 us
Spontaneous Fluorescence Lifetime230 us
Linewidth0.6 nm
Pump Wavelength807.5nm
Absorption Bandwidth1nm
Polarized EmissionUnpolarized
Thermal BirefringenceHigh
Loss Coefficient0.003 cm-1 @ 1064nm

 

Specifications:

Doping  (atm%)                            0.2%~ 2.5%
Orientation<111> crystalline direction                       
Wavefront distortionλ/8 per inch @ 633 nm
Extinction Ratio>28dB
Dimension TolerancesDia.: +/-0.025 mm , Length: +/-0.5 mm
Surface quality10/5 Scratch / Digper MIL-O-1380A
Parallelism< 10 arc seconds
Perpendicularity< 5 arc minutes
Clear Aperture>90%
Flatness<λ/10 @ 633 nm
chamfer<0.1 mm @ 45deg
Barrel Finish50-80 micro-inch (RMS) ,
Anti-Reflection CoatingR < 0.20% @ 1064 nm per surface. Damage threshold over 1GW/cm2@ 1064nm, 10 ns and 10 HZ
High-Reflection CoatingStandard HR coating with R>99.8% @ 1064nm and R<5% @ 808nm

Note: Other specifications of Nd:YAG crystals and coatings are also available upon request.