Infrared Nonlinear Crystal - AgGaS2 (AGS)
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China
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On FindLight:
since 2018
Description
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.
Infrared Nonlinear Crystal - AgGaS2 (AGS)
Specifications |
|
|---|---|
| Crystal Type: | AgGaS2 (Silver Gallium Sulfide) |
| Phase Mathcing Type: | Not Applicable |
| Mounting: | Mounted |
| Width: | 5 mm |
| Height: | 5 mm |
| Length: | 20 mm |
| Flatness: | <= Lambda/4 |
| Surface Quality (Scratch-Dig): | 20-10 |
| AR Coating: | Both Sides |
Applications
• Generation second harmonics on CO and CO2 - lasers
• Optical parametric oscilator
• Different frequency generator to middle infrared regions up to 12 mkm.
• 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 %
Frequently Asked Questions
AGS is an infrared nonlinear crystal that is transparent from 0.50 to 13.2 µm.
AGS can be used for generation of second harmonics on CO and CO2 lasers, optical parametric oscillator, different frequency generator to middle infrared regions up to 12 mkm, frequency mixing in the middle IR region from 4.0 to 18.3 µm, tuneable solid state lasers, optical narrow-band filters, and up-conversion of CO2 laser radiation image into near-IR or visible region.
The standard cross-sections of AGS are 8x8mm and 5x5mm, and the crystal length ranges from 1 to 30mm. Custom sizes are also available on request.
The technical parameters of AGS include wavefront distortion less than λ/6@633nm, dimension tolerance of (W+/-0.1mm)x(H+/-0.1mm)x(L+0.2mm/-0.1mm), clear aperture of >90% central area, flatness of λ/6@633nm for T>=1.0mm, surface quality of scratch/dig20/10 per MIL-O-13830A, parallelism better than 1 arcmin, perpendicularity of 5 arcminutes, and angle tolerance of Δθ<+/-0.25o, Δφ<+/-0.25o.
AGS displays excellent bulk quality across the transmission range, except for residual array absorption centered near 1.8um. The phase matching and nonlinear optical properties of AGS allow various SFM/DFM interactions from the visible to Middle infrared.