AGGSe Crystal
WaveQuanta

AGGSe (AgGaGe5Se12) Nonlinear Crystal for 1 µm-Pumped Mid-IR, 0.63–16 µm

WQ-NLC-AGGSE
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AGGSe (AgGaGe5Se12) is a newer nonlinear optical crystal for shifting 1 µm solid-state lasers into the 2–12 µm mid-infrared range. Compared with AgGaS2 and AgGaSe2 it offers a higher damage threshold, larger birefringence and band gap, and more phase-matching options, which suits it to higher-power and specialised frequency conversion. It is transparent from 0.63 to 16 µm with a nonlinear coefficient d31 = 28 pm/V.

Key Features

  • Transparency range 0.63–16 µm
  • Nonlinear coefficient d31 = 28 pm/V
  • Higher damage threshold than AgGaS2 and AgGaSe2
  • Larger birefringence and band gap, giving a wider choice of phase-matching schemes
  • Coated elements up to 18.55 mm long, with HT coatings at 1064 nm, 1550 nm and 5–14 µm
  • Flatness λ/8 @ 633 nm, parallelism better than 30 arc sec, orientation accuracy below 30 arc sec

Typical Applications

  • Frequency down-conversion of 1 µm solid-state lasers into the 2–12 µm range
  • Higher-power mid-IR frequency conversion as an alternative to AgGaS2 and AgGaSe2
  • Specialised nonlinear interactions that need phase-matching schemes not available in AgGaS2 or AgGaSe2

Standard Sizes

Size Cut / orientation Surface / coating Mount
5.25 × 5.5 × 18.55 mm θ = 63°, φ = 0° S1: HT @ 800–1500 nm (R < 1%); S2: HT @ 1064 nm (R < 1%) + 1550 nm (R < 1%) + 5–14 µm (R < 3%) —
5.71 × 5.29 × 13.68 mm θ = 61°, φ = 0° S1: HT @ 800–1500 nm (R < 1%); S2: HT @ 1064 nm (R < 1%) + 1550 nm (R < 1%) + 5–14 µm (R < 3%) —
5.72 × 5.58 × 13.7 mm θ = 61°, φ = 0° S1: HT @ 800–1500 nm (R < 1%); S2: HT @ 1064 nm (R < 1%) + 1550 nm (R < 1%) + 5–14 µm (R < 3%) —
5 × 5 × 0.35 mm θ = 65°, φ = 0° Polished, uncoated —
5 × 5 × 1.5 mm θ = 65°, φ = 0° Blank (unpolished) —
5.5 × 5.5 × 3.5 mm θ = 67°, φ = 0° Blank (unpolished) —

Availability of individual sizes changes; custom sizes, cut angles and coatings are available on request.

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Model: WQ-NLC-AGGSE · Custom sizes, orientations and coatings on request — contact WaveQuanta for a quote and lead time.

Chemical Formula AgGaGe5Se12
Transparency Range 0.63–16 µm
Nonlinear Coefficient d31 = 28 pm/V
Mid-IR Output Range (1 µm Pump) 2–12 µm
Dimension Tolerance (W ±0.1 mm) × (H ±0.1 mm) × (L +1/−0.5 mm)
Clear Aperture > 90% of central area
Flatness λ/8 @ 633 nm (T ≥ 1 mm)
Surface Quality 60-40 scratch/dig after coating
Parallelism Better than 30 arc sec
Perpendicularity 10 arc min
Orientation Accuracy < 30 arc sec
Specification Sheet PDF — Download
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