AGS(AgGaS2) crystals

AGS is transparent from 0.50 to 13.2 µm. Although its nonlinear optical coefficient is the lowest among the mentioned infrared crystals, high short wavelength transparency edging at 550 nm is made use of in OPOs pumped by Nd:YAG laser; in numerous difference frequency mixing experiments with diode, Ti:Sapphire, Nd:YAG and IR dye lasers covering 3–12 µm range; in direct infrared countermeasure systems, and for SHG of CO2 laser. Thin AgGaS2 (AGS) crystal plates are popular for ultrashort pulse generation in mid IR range by difference frequency generation employing NIR wavelength pulses.

Lattice parameters: a = 5.757, c = 10.311 Å

Melting Point: 997 °C

Density: 4.702 g/cm3

Mohs Hardness: 3-3.5

Absorption Coefficient: 0.6 cm-1 @ 10.6 µm

Relative Dielectric Constant @ 25: ε11s=10ε11t=14

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Product Detail

Technical Parameters

Test Report

Stock list

Applications：

• Generation second harmonics on CO and CO2 - lasers
• Optical parametric oscilator
• Different frequency generator to middle infrared regions up to 12μm.
• Frequency mixing in the middle IR region from 4.0 to 18.3 µm
• Tuneable solid state lasers (OPO pumped by Nd:YAG and others lasers operating in 1200 to 10000 nm region with efficiency 0.1 to 10 %)
• Optical narrow-band filters in the region near isotropic point (0.4974 m at 300 °K), transmission band being tuned at temperature variation
• Up-conversion of CO2 laser radiation image into near-IR or visible region by using/ or use of Nd:YAG, ruby or dye lasers with efficiency up to 30 %

Basic Properties
Lattice parameters	a = 5.757, c = 10.311 Å
Non-linear coefficient at 10.6 um	d36 = 12.5 pm/V
Optical damage threshold at 10.6 um, 150 ns	10 - 20 MW/cm2
parallel to c-axis	12.5 x 10-6 x °C-1
perpendicular to c-axis	-13.2 x 10-6 x °C-1
Crystal Structure	Tetragonal
Cell Parameters	a=5.756 Å, c=10.301 Å
Melting Point	997 °C
Density	4.702 g/cm3
Mohs Hardness	3-3.5
Absorption Coefficient	0.6 cm-1 @ 10.6 µm
Relative Dielectric Constant @ 25 MHz	ε11s=10ε11t=14
Thermal Expansion Coefficient	\|\|C: -13.2 x 10-6 /oC⊥C: +12.5 x 10-6 /oC
Thermal Conductivity	1.5 W/M/°C

Technical Parameters
Wavefront distortion	less than λ/6 @ 633 nm
Dimension tolerance	(W +/-0.1 mm) x (H +/-0.1 mm) x (L +0.2 mm/-0.1 mm)
Clear aperture	> 90% central area
Flatness	λ/6 @ 633 nm for T>=1.0mm
Surface Quality	Scratch/dig 20/10 per MIL-O-13830A
Parallelism	better than 1 arc min
Perpendicularity	5 arc minutes
Angle tolerance	Δθ < +/-0.25o, Δφ < +/-0.25o

Model	Product	Size	Orientation	Surface	Mount	Quantity
DE0742-1	AGS	550.4mm	θ=39°φ=45°	AR/AR@1.1-2.6μm+2.6-12μm	Unmounted	6
DE0053	AGS	550.5mm	θ=41.3°φ=0°	AR/AR@1.1-2.6μm+2.6-12μm	Unmounted	1
DE0741	AGS	551mm	θ=39°φ=45°	Both sides polished	Unmounted	1
DE0743	AGS	662mm	θ=54.9°φ=45°	Both sides polished	Unmounted	1
DE0891-1	AGS	662mm	θ=50°φ=0°	Both sides polished	Unmounted	3
DE0149	AGS	880.38mm	θ=41.6°φ=45°	AR/AR@1.1-2.6μm+2.6-12μm	Unmounted	1
DE0367	AGS	880.4mm	θ=39°φ=45°	AR/AR@1.1-2.6μm+2.6-12μm	φ25.4mm	1
DE0367-0	AGS	880.4mm	θ=39°φ=45°	AR/AR@1.1-2.6μm+2.6-12μm	Unmounted	8
DE0367-1	AGS	880.4mm	θ=37°φ=45°	AR/AR@1.1-2.6μm+2.6-12μm	Unmounted	8
DE0367-2	AGS	880.4mm	θ=37°φ=45°	AR/AR@1.1-2.6μm+2.6-12μm	φ25.4mm	1
DE0367-3	AGS	880.4mm	θ=39°φ=45°	AR/AR@1.1-2.6μm+2.6-12μm	φ25.4mm	1
DE0119	AGS	881mm	θ=39°φ=45°	AR/AR@1.1-2.6μm+2.6-12μm	φ25.4mm	3
DE0119-0	AGS	881mm	θ=39°φ=45°	AR/AR@1.1-2.6μm+2.6-12μm	φ15.4mm	3
DE0119-1	AGS	881mm	θ=37°φ=45°	AR/AR@1.1-2.6μm+2.6-12μm	Unmounted	7
DE0119-3	AGS	881mm	θ=39°φ=45°	AR/AR@1.1-2.6μm+2.6-12μm	Unmounted	5
DE0671	AGS	881mm	θ=39°φ=45°	Both sides polished	Unmounted	1
DE0957	AGS	φ3*0.4mm	θ=39°φ=45°	AR/AR@1.1-2.6μm+2.6-12μm	φ25.4mm	1