Silver Gallium Sulfide (AGS)
AgGaS2(AGS) crystal is one of the most effective nonlinear laser crystals used in the infrared working band at present. Because of its large nonlinear coefficient, high infrared transmittance, low optical absorption and scattering, and low wavefront distortion performance, its application in the infrared field has been popularized more and more. At present, this kind of crystal is the best choice for the frequency doubling material of CO2 laser with 10.6μm output.

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Product Description:


Nature and Characteristics:


AgGaS2(AGS) crystal is one of the most effective nonlinear laser crystals used in the infrared working band at present. Because of its large

nonlinear coefficient, high infrared transmittance, low optical absorption and scattering, and low wavefront distortion performance, its application in

the infrared field has been popularized more and more. At present, this kind of crystal is the best choice for the frequency doubling material of

CO2 laser with 10.6μm output.


Main Applications:


l  Used in the infrared field with large nonlinear optical coefficient and high transmittance.

l  Frequency doubling device for outputting 10.6μm CO2 laser

l  It can be used in OPO device of Nd: YAG laser.

l  Suitable for frequency mixing in OPO output from Nd:YAG lasers, Ti:sapphire lasers, and various dye lasers.


Basic Parameters:


Transmission Range0.47 – 13 μm
Lattice Constantsa = 5.757 Å, c = 10.311 Å
Density4.58 g/cm³
Mohs Hardness3.0 - 3.5
Nonlinear Coefficientd₃₆ = 12.5 pm/V @ 10.6 μm
Melting Point998°C
Absorptivity< 0.03 cm⁻¹ @ 1.064 μm
< 0.02 cm⁻¹ @ 10.6 μm
Thermal Conductivity1.0 W/m/°C
SHG Phase Matching1.8 - 11.2 μm
Damage Threshold30 MW/cm² (surface) @ 1.064 μm, 10 ns
Thermal Expansivity‖C: -8.1 x 10⁻⁶ /°C
⊥C: +19.8 x 10⁻⁶ /°C



Processing Parameters:



Orientation Accuracy< ±0.1°
Surface Quality20/10 per MIL-O-13830A
Surface Flatnessλ/8 @ 632.8 nm for T ≥ 1 mm
Clear Aperture Tolerance+0 / -0.1 mm
Length Tolerance±0.1 mm
Parallelism30″
Perpendicularity10′


   





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