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BGSe (BaGa4Se7) Nonlinear Crystal for Mid-IR, 0.47–18 µm, d11 = 24 pm/V
WQ-NLC-BGSEContact for pricing
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AGGS (AgGaGeS4) Nonlinear Crystal for 1 µm-Pumped Mid-IR, 0.5–11.5 µm
WQ-NLC-AGGSContact for pricing
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AGGS (AgGaGeS4) is a solid-solution nonlinear crystal transparent from 0.5 to 11.5 µm, with a nonlinear coefficient d31 = 15 pm/V and an absorption coefficient of 0.05 cm⁻¹ at 1064 nm. It is used to shift 1.064 µm Nd:YAG output into the 4–11 µm mid-infrared range. Compared with its parent compounds it has a higher laser damage threshold and a wider choice of phase-matching conditions, making it an option alongside AgGaS2 for sustained, higher-power frequency conversion.
Key Features
- Transparency range 0.5–11.5 µm
- Nonlinear coefficient d31 = 15 pm/V
- Absorption coefficient 0.05 cm⁻¹ at 1064 nm
- Damage threshold 1.08 J/cm² (surface) and 1.39 J/cm² (bulk)
- Higher damage threshold and more phase-matching options than its parent crystals
- Standard apertures 5 × 5 mm and 8 × 8 mm, lengths 1–30 mm; custom sizes on request
Typical Applications
- Frequency shifting of 1.064 µm Nd:YAG lasers into the 4–11 µm mid-IR
- Sustained, higher-power mid-IR frequency conversion where AgGaS2 is damage-limited
- Nonlinear interactions that need phase-matching schemes not available in AgGaS2
Standard Sizes
| Size | Cut / orientation | Surface / coating | Mount |
|---|---|---|---|
| 5.8 × 5.7 × 1.9 mm | θ = 50°, φ = 0° | Blank (unpolished) | — |
| 10.8 × 11.4 × 1.9 mm | θ = 50°, φ = 0° | Blank (unpolished) | — |
Availability of individual sizes changes; custom sizes, cut angles and coatings are available on request.
Related Products
- AGGSe Crystal — selenide variant
- LGS Crystal — 1 µm-pumped mid-IR
- BGS Crystal — wide transparency
Browse all: Mid-IR Nonlinear Crystals · Nonlinear Crystals
Model: WQ-NLC-AGGS · Custom sizes, orientations and coatings on request — contact WaveQuanta for a quote and lead time.
| Chemical Formula | AgGaGeS4 |
| Transparency Range | 0.5–11.5 µm |
| Nonlinear Coefficient | d31 = 15 pm/V |
| Absorption Coefficient | 0.05 cm⁻¹ @ 1064 nm |
| Surface Damage Threshold | 1.08 J/cm² |
| Bulk Damage Threshold | 1.39 J/cm² |
| Standard Cross Sections | 5 × 5 mm, 8 × 8 mm |
| Length Range | 1–30 mm |
| Dimension Tolerance | (W ±0.1 mm) × (H ±0.1 mm) × (L +0.2/−0.1 mm) |
| Clear Aperture | > 90% of central area |
| Flatness | λ/6 @ 633 nm (T ≥ 1.0 mm) |
| Wavefront Distortion | < λ/6 @ 633 nm |
| Surface Quality | 20/10 scratch/dig per MIL-O-13830A |
| Parallelism | Better than 1 arc min |
| Perpendicularity | 5 arc min |
| Angle Tolerance | Δθ and Δφ within ±0.25° |
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